Well, I tried out the Legend mode on PS3. Theres some cool things and some annoyances here. Its cool starting as a rookie, going through your high school playoffs, then getting taken based on your play ability or pick your own school and work your way up the ranks.
I first tried playing as a WR. I'll tell you this, its pretty difficult moving up the ranks as a WR, and if you follow all your routes in your HS games, you're not going to get the ball often. Once I started my college career, I found that if I don't always run my route, I get the ball a lot more often. Comeback routes, out routes, and play action slants seem to have the best chance of you getting the ball, but they're not foolproof. Occasionally, if I see a hole in the defense, like in a zone, I'll run there and let the QB play pitch-n-catch with me. I started getting the ball a LOT more after doing this, as the CPU playin' QB for you is hesitant to even throw into 1-on-1 coverage. Once I started using this method, I shot up to 2nd string WR before quitting, starting a new game and trying QB out.
I found there were a few other methods to increase your practice points to help your player gain attributes and move up the ladder on the team. If you're a wide receiver, for instance, you can lead block on running plays to get an extra point I believe. Using the truck stick to knock a DB on his ass works great. Also, if you're a QB, ANYTIME you pitch the ball during a run play you'll get a point, even if it turns into a fumble. I've actually found that pitching the ball to get your point is safer than trying to run for 10 yards, get a first down, and get the 2 points.
One of the annoyances I've had is the play calling, its horrible, really horrible. Playin' as ND, the computer is calling option plays 60-75% of the time I would say. This would be great if it was still the 80s and 90s, but we no longer run the option. There is a QB that can run it, Jones wasn't the one I decided to try Legend mode with. Fortunately, my option gameplay is stil pretty good so I can make it work, and I can audible to a pass play after the 5th or 6th option in a row.
As far as the problem with fumbling, I haven't really seen it yet. The only game I had a fumbling problem was a real rainy game, which can be expected. I've seen the computer attempt to strip the ball numerous times though, sometimes successful, sometimes not. I generally use a ball carrier with a high carry attribute.