If it's great content, it might make more sense to keep it on your website. Some blog posting is okay, but too much of any one kind of links will only cause issues, both short term and long term. Think about Directory Links 5 years ago. Everybody got 500 Directory Submissions for $50 and so on, and those are the kinds of links people are getting Unnatural link warnings for.

So I'd recommend evaluating your link strategy and only build quality links, rather then faster links, instant approval links, focus on quality and user engagement vs quantity.

I hope this helps.

What CMS is it Mark ?

I agree. I would suggest adding the noindex on the pages and letting the bots crawl them. Blocking them would prevent future crawl of these pages, but I am guessing you would also want to remove the existing pages.

Therefore add the noindex first, wait a few days and then add the disallow (Although technically if they are noindex, you don't really need the disallow).

I agree with Neil. It's not bad, just a good user practice to keep them lowercase so that's there's no confusion. The best bet for you would to be to use a consistent format and mimic that in your canonical URLs so only that variation gets crawled and indexed.

Some domain management companies let you do a 301 redirect of a domain to another domain...however they might only do domain.com to newdomain.com not specific/individual and customized redirects.