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No i would not remove pages, How pagerank works is in simple terms, image that every page is awarded 1 point, you have 3 pages your site has 3 points, you add 3 more pages , your site has 6 points, but divided by 6 pages, back to where you started. but by internal linking you can pust that 6 points onto one page, you may end up with 1 page with 3 points and 5 pages with 0.5. What i would do, is chose a page you want to rank for a subject, term, keyword. then all other pages that have relevance i would link to this page. I once again suggest reading this page http://www.webworkshop.net/pagerank.html

no, not to large, it was the third most popular page behind the homepage. Whole page size is around 3mb.

Hi! Sorry for the delay in response. We do appreciate the great feedback! Did you know we have a feature request forum? It's a great place to share your ideas. Other people can vote on them and it will help us determine priorities. You should check it out: http://seomoz.zendesk.com/forums