Can you elaborate? it’s not likely we’d add a dedicated feature that’s essentially the same as flair but in a different position, so it would be helpful to know what the issues with flair are if it needs to be improved.
A theme component is the best way to go about this, but there are going to be multiple paths to add it in different contexts (in posts, on profiles, in the user directory, etc) .
I’ve built an example theme component here — this shows the group flair icon after the username in the post, rather than on the avatar.
I think you could give us a little grace here, there are many platforms where a change like this isn’t possible at all!