I have run about a dozen test Franchises with various rosters (DaRebirth, Shaggrugg, Default and Current EA downloaded version) and:
1) The UDFA idea was nice, but implemented pretty poorly...too many 2-3 round picks and mid level vets getting cut for these guys...too much work for me (to do all 32 teams), so I can live with it or not..
2) Sim stats need some Coach Philosophy Run / Pass tweaks or some QBs throw well over 600 passes...seems keeping things in the 50-60 range with the Pats being the only 70% team gets things close...however, the punt attempt stats are insanely high, with no workaround (as far as I can tell)
3) You pretty much have to set "Re-sign Players" to User...Manning, Cutler, Shaub and a few other major dudes can end up on the FA list after year one...and that's just the QBs...it doesn't happen with EVERY sim test...but often enough for concern...
4) If you want to see 2011 play out with Manning on the bench, you have to set "Reorder Depth Cart" to user...however, it seem no matter how crappy I make Painter, or how good EA updates Alex Smith, Painter turns out pretty good and Smith does not...ratings are not the sole equation for the sim stat engine...so who know what the workaround is here...
5) If you want to trade the IRL Draft Picks around for the 2012 draft, you'll need to control that too...since it really affects Bengals / Raiders (Palmer trade), Pats (Ochocinco / Haynesworth), 'Skins and a few others...I like it to be fairly accurate...
Lastly: The NCAA draft class glitch (doesn't import IRL players and substitutes generated rookies if you don't save at a certain point) is also a franchise issue...
Good news?
You can control as much of this as you like and then switch it up and control as many or as few teams as you like at the beginning of each off season...
Some of the HC firings are questionable (Coughlin), so if that bothers you...prepare to control that too...
Bottom line:
I've been on top of the "state of the art" Franchise workarounds for a decade and this years shoddy version (based on the advertised "improvements") have created a hornets nest of workarounds for even a casual sim franchise player...
KB and A&S have some great insights and suggestion (quoted), but those along with what I've seen will either make this title:
1) A LOT of off field work for user
2) A year where things like "Fantasy Draft" start looking like a desirable option...it's going to take a lot of time and effort to keep it from turning into that playing a "normal" franchise...
3) Need to lower / eliminate "Sim / Realistic" expectation...believe me, despite this detailed post, I'm pretty accepting of what we end up with, as far as these titles are concerned...but after running these tests, the "complaints" re: NCAA12 seem VERY slight by comparision
Very disappointing findings, IMHO re: these tests...
Any insight appreciated!