No and no.
Rare is good. +as Tim said, you can use them for quite a while with the amount of charges provided.
Rather would have super rare items than slowly working towards another item that every one has (meaning, if they had a higher drop chance AND they would be rechargeable - none of them would go out of the game).
And this is an opinion that comes from someone with 8k rev kc. I would suggest farming them yourself instead of pking people who are trying to get them and then talk about "hard to get".
