I've had a DITR that made my player worse! I had a 30 OVR C, with 8 DUR, that had awesome hitting/defensive ratings, so when the DITR 'boost' came it just fiddled with the ratings, and made him actually worse (at least IMO). I think it should be linked to budgeting in some way, investing in training/coaching/scouting should pay dividends when its compared to someone that doesn't invest, if you're not willing to pay for the relevant budget area then you should be at a disadvantage.