What about Rogue functioning somewhat like Legion does/did? In that she has to negotiate, bribe or overpower the personalities in her head in order to use their powers. The stronger the personality, the harder it is to access that power. Same goes for trying to use multiple powers at once.
There would also be a weakness for borrowing powers where the personality gets a stronger presence in her mind the longer Rogue tries to use them. She wouldn't be hopped up on powers 24/7.
And if she just doesn't want to deal with all the drama, she'll just absorb a power-source straight from an intended target. Thus keeping the touch/kiss tactic.