Since all marksman skills can consume the precision key passive once it reaches 5 layers, it makes this passive only reliable if you completely remove the use of basic skills (at the same time the combo points). This passive should be adjusted to be only consumable by non-basic marksman skills to be usable.
Eh, I think the point of it is to push you into the non-basic skill niche, which is totally possible btw. There are plenty of energy regen options on rogue!
You are right! There are ways to adapt to that. But I think making precision non-basic skill triggered enables more builds and does not affect the current no-basic-skill builds. And variety is one of the main targets of a game like D4. Btw there are not many builds that utilizes combo points. More buffs needed to make this playstyle compareable to the others.