Keyword stuffing your homepage isn't the best decision. I'd keep my homepage something like:

Company Ltd.: Web development solutions (anyway, something that best describes your entire site, company)

The landing page(s) could have a title like:

****Company Ltd.: Web design services

or

Web design services | Company Ltd.

Good luck.

It's been a while since I haven't used GWT, but I thing you have a limit of 500 requests/day or something like that.

As soon as those requests are processed the counter resets.

Philip,

Letting Google to follow the archive pages, helps it to determine the website's hierarchy.

Google can handle duplicate content of a website.

Excluding tag or category archives from Google's index, may lead to loosing some visitors. Here is a nice wrap up regarding this issue.

If you use Yoast's SEO plugin, you can let Google index only the main page of the archive pages and noindex the rest of them (page1, page 2 etc.)

I would place a noindex meta tag for date archives, though.

Hope that helps, cheers.

If those comments are generating traffic it's ok, but I'd apply a nofollow tag to the links. They're simply not natural.