Omemo 0.3 is perfectly fine and on the level of what most other e2ee apps do. There is a non-sense troll article claiming otherwise, but that one has been long debunked (however the author deleted the comments correcting it 🤦).

Omemo 0.8 and later (including a soon available post quantum encryption variant) is an improvement beyond that, which is of course not bad to have, but few clients support it so far.