If you use Bing Webmaster tools you can see a complete list all URLs blocked by robots.txt. You can export the file and then filter.

Just go to Reports & Data > Crawl Information within your Bing webmaster account. I am not aware of this feature being in Google webmaster tools. Hope this helps.

Wow, that's a pretty comprehensive list of actions you've compiled there and you seem to have covered pretty much all the bases. I almost think your post should be promoted on Youmoz as a great step of actions for targeting regional websites.

My experience of hreflang is that it is not perfect in that you occasionally get the wrong versions of pages served in SERPs. I wonder do you specify the .com as 'en' in the hreflang mark up in order that it is the generic English language version as opposed to being country specific?