Manes are such an iconic part of ponies' designs that in hindsight, it feels weird to me to have left them out of MLPF's original emotes (I wasn't especially involved with them in the first place though and we all found them cute, fun, and cool at the time, so I don't say I regret it either). I know they're unique to this site and some may consider them iconic but if I could go back and do it all over again, I'd want to have them designed in a way that prominently includes every pony's mane.
So, I'm all good with seeing manes in new emotes personally. I wouldn't mind retroactively revisiting the old ones and making a new alternate set that includes manes either.
Did you make your emotes there by editing TYT screenshots or did you draw them from scratch?