Using e seems to be a more natural non gendered replacement for native speakers. Like amigues instead of amigos/as.

I’ve never seen people drop the vowel entirely

latín in Spanish technically means Latin, as in the language. I have heard latine used before but it’s not at all common.

Using e as a gender neutral marker instead of o or a seems to be the most popular way of doing it, but I’m not an expert and would be happy to be corrected by someone who is more familiar with it.