I think it's great that we can't see the number of favorites on toots in the feed.
To be honest, I think it would be better if there was no 'like button' at all: the little dopamine hit of validation is one of the addictive elements of social media.
It would also be an advantage not to see follower #'s on profiles or like #'s on detail expands.
Still: I think seeing replies is different b/c it encourages entry into ongoing conversations.