It could be players not executing properly but from what I have seen:
1) zero commitment on defense, think Butler against UConn for the first 30 minutes. They had a plan and they stuck to it until they got tired. Georgetown has no plan, or executes it poorly.
2) horrid shot selection. It is probably a bit of personnel but they take a ton of mid-long range two point shots.
3) very poor ball movement. This is coaching, they don't pass often at all and have zero/negligible movement from two-three positions most times down the floor on offense.
Positives:
1) they make a good amount of their twos. They have shot-makers (doesn't mean they should take those shots, but they do make a good percentage of hard shots compared to most teams)
2) they do rebound decently.