Can you guys share any position and the ability/x-factor you find most useful? or a forum reference that has this discussion already
I feel like this is the first year I have not gotten any use out of the abilities
Ideally, what do you use on DE, CB, QB, RB, WR
This is tough because it's all predicated on how you play/your scheme. I don't run anything on DE's personally (or my d-line altogether except for 1AP inside stuff on a DT.) For my corners, I run a lot of cover 3/cover 4, so I like deep out zone ko on both my outside corners, along with pick artist/lurk artist. Expensive, but it's the best ability in the game IMO. I like deep in zone ko on my FS (sometimes I'll add it to my SS too.) For your QB, it depends on preference. I'm a huge SFL guy - once you play with it, you won't be able to go back to not having it. It makes that much of a difference, especially on corner routes, crossers, etc. I personally prefer SFL and Gunslinger > HRM. Others may disagree if you like having all the route combos at your disposal. Gift wrapped was a must early in the year, but now is almost a convenience, rather than a must have. At RB, I only run jukebox, except for the X Factor backs - those pre-lits are game changers, especially for cards like Henry. At WR, I personally only run free abilities. Love Megatron's double me X Factor, along with free route tech X Factor on Deion WR. If your opponent has a ton of KO's at corner/safety, they'll nullify a lot of your WR abilities anyway. I usually use most of my AP on my QB, and with offensive AP being limited, you almost have to have it set up that way.
Frostybirdman has some good advice. Just going to add that if you choose to go SFL you may want to consider abilities like RB apprentice, slot apprentice, or te apprentice if you still want to have some of the better hot routes available.