I see many people are confused by this

You do not have to move around to combo. At all.

Weaponskills now may have two bonuses. One is for positioning, the second is for combos. They are independent from each other. So, while it's true that combo + position bonus > just the combo, it still doesn't mean you have to move around to combo.

Therefore, I don't see how they couldn't be useful for EXP parties and the like. Free TP + Extra damage is always useful, even if the monster dies too quickly to bother moving a lot.