I'm a bit disappointed with how useless those powers are against other Force users. So, for some fun Dark Side carnage, would it be possible to do something like this:
1. Give the ability to resist
Force Grip/Drain, just like Push/Pull. But...
2. ...If Grip/Drain lands, there's no way of getting free unless the attacker runs out of Force power or the defender activates Force Absorb.
A bit 'unrealistic', I suppose, but as I said, it's just for fun.