Wait! Look closer Everyone! Elves have longer pointed ears than half elves. So they ARE totally different. 😏
I do get why many have an issue. If this was a game for star wars or star trek, and someone made a bunch of models for a race like the chiss, but they only gave them dark skin, that would be dumb. There are more distinguishing traits for the race than mere pointy ears.
You could - for example - have a half-elf with "normal" (i.e., human) ears, but with especially elven eyes. There you go...more variety.