Spec vs spec? Good players can make it work in most situations up to the level of people who have already tested it.
I would be more concerned with ongoing issues with talents being unusable right after a big patch. No real choices so we all get bored of the very fixed toolkits within specs. If they put some effort into fixing the balance between talents the specs would actually have toolkits that didn’t feel so linear and boring.
Then there are blatant turds like drain soul still floating...