According to Google, here's when rel="alternate" hrefland="x" is recommended:

• You translate only the template of your page, such as the navigation and footer, and keep the main content in a single language. This is common on pages that feature user-generated content, like a forum post.
• Your pages have broadly similar content within a single language, but the content has small regional variations. For example, you might have English-language content targeted at readers in the US, GB, and Ireland.
• Your site content is fully translated. For example, you have both German and English versions of each page.

You've got a few issues with this client:

1. They are telling you how to do SEO. If I felt I had to defend what should be put in the description tag, I'd leave a client in a heartbeat. I mean, what are they hiring an SEO for?  Why not just dictate their wished to their web designer and save a few bucks?

2. They are telling you to do the wrong things.  Almost 4 years ago, Matt Cutt let us know that Google doesn't use the meta keyword tag any longer (except, now for Google News) and Bing uses it to help identify spammers (like your client?).

3. 50 cities?  Why stop there?  Why not drop in all 50 states--and each of their major cities? If they don't all fit in the description, you could put them up in the title tag! The client doesn't understand algorithmic search or the value of your guidance and that make for an uncomfortable work relationship.

If the client wants to serve fifty cities, they should first begin to engage customers in fifty cities.  The client shouldn't count on Google to introduce him/her to those markets. The client introduces himself/herself there, begins engaging clients with content through social channels and then Google reflects that engagement that in their search results.

If the client actually has offices with physical addresses that can recieve mail in those 50 cities and phone numbers that can answer a phone call in those 50 cities then the client needs to invest in local search marketing to assist with their visibility in the local results.

Sorry to all, I shouldn't have replied in that manor.

My initial thought was a snide 'Well, what changes were you expecting to notice?".  But, while I was out searching to see if maybe there was some hitherto unknown-to-me legitimate reason for you to expect something, Guru Fisher beat me to the punch.  I guess that's why he's a guru.

Anyway, I didn't find anything that changed my mind and had someone done even the little bit of searching that I just did, there'd probably be no reason to ask the question you asked. Additionally, I'm wondering about the logic of going ahead and paying for a service that may not have been providing you a perceived value as a free tool.

Often you're better off ,putting your efforts into a single domain and getting that to rank, rather than splitting your efforts between all those other domains--I mean, what  are you going to do with those new sites that is going to get them to rank that you couldn't do with your original domain?  If they're exact match domains, I wouldn't count on their effectiveness for the long term--or even for the short term.

Do you already have a main site that is ranking for all the main keywords and you're just about to roll out these five new ones or are these five new sites your first ones and your business plan revolves around those five?

A search engine considers a subdomain to be a different entity from the root domain and links to and from are considered external.  Don't be counting on those links from the subdomain to be doing much for the root domain, though, unless your root domain is a strong entity unto itself.  A few links from separate pages may be helpful but engines won't be oblivious to the fact that  their coming from the same IP address as the root domiain (as most subdomains are).

Think of the gazillion Wordpress sites out there--they're all the same architecture and they can rank.  Your tactic used to be more prevalent, back when linking between sites (you won't be doing that, will you?) with thin content (they won't have that, will they?) helped lift all of them in the rankings.

While there are plenty of examples of multiple sites owned by the same company showing up in  the same page-one search results, there are as many, or more, examples of them all showing up at the bottom of the results.  It seems to me that if you're asking the question you're asking --at this point in the project, you may not be well enough informed to keep yourself out of the later group. I'd kindly recommend doing some additional homework before you launch.

See if he'll let you do a 2 month  test with a different home page and let him see the difference in the traffic/business and then let him make a more informed decision.

On  the other hand, the page that all your "home" navigation links go to should be a page like the one you wish your home page would be--a page with a bit more static content than the /начало/ page and one that other parties might link to instead of the domain's (current) default page. Develop your external links to that page.

In the market you're working in, you better have real, link-worthy, thought leadership-type blog posts regardless of what's on your homepage because it's likely that the majority of your search traffic will land on your blog posts--at least until you build awareness and strength for your brand. Don't blame the lack of traffic on the boss' decision on the home page if you haven't pushed really hard for top quality content. If you've done that and he/she hasn't complied, blame the lack of traffic on their business sense, not necessarily on the web site.