Removing duplicate content and replacing w/ unique

Hey there, I have a handful of sites (26 or so) that I run autoblogs on and make somewhere between nothing and not a lot from adsense etc, and I was considering a change of pace?

My plan is to remove wprobot from them all and delete the content, then start over posting fresh content daily (moving through a list every day to where each site would probably get an article a week?). My question is:

A: Would I benefit from deleting all of the duplicate content like I plan on doing or will it not make a difference?

B: Is it too late now that some of my blogs have ran WPRobot for over a year now and will I be penalized even if i remove everything and start fresh because Google knows what i've been up to?

C: Will I benefit a lot from the unique content when each site would only gain an article once a week compared to an autoblog that after the last year had like 900 posts?

D: Should I try to link every post (if its a money making niche for example) to an affiliate program or book or something? Clothing one to be written about specific types of clothes or item and link to it on amazon etc? Is there
some way in which linking all of your posts to affiliate type offers can hurt you if it is at the tail end of your 500-600 word article? (Dumb question?)

Any advice would be great. The goal would be to focus on a couple sites every day and write an article for each plus spend an hour doing backlinks and if free time maybe submit an article or two with backlinks that way too?