Good point but I don't really care about E2EE for my usecase. I mainly use it for my local bridges and my Matrix instance isn't even publicly accessible or linked to the rest of the matrix network. So for my use it really doesn't matter.
I think Nheko suffers from low-density UI the same as Element. Especially the room list. But unlike Element it does support tags properly which is indeed great.
A PR was merged recently to make reading encrypted messages in libquotient (the lib used by both Quatermion and NeoChat). Another one is in the work to send encrypted messages.