Nws. If I could get your ign I can give a better answer but generically:
I value giving pierce to characters who don’t have it natively because I love removing opponent HP when there’s nothing they can do about it. I have one on Strange and this coming sale I’ll get one for Cap.
However many ignore the pierce and think of it from a PVP x PVE perspective and put it on metas like QS, SW, Jean Grey, etc. See below for some people’s opinions: