I like the current meta. 1 main healer and 1 hybrid dps/healer that heals only when necessary. There's nothing that needs to be fixed since there's nothing broken.
You can say that you don't like it and that you would like to see it change, but this is just how devs shaped their game.
are raid patterns too easy to recognize when it comes to knowing when to heal?
By raid you mean...Alexander Savage? It's the most difficult raid to date. Thordan is the most challenging ex trial as well, both for healers and tanks/dps (still quite easy though, but I do like it a lot). I think it's just that the end game community is getting better and healers are learning how to be more efficient. It's not like every turn of coil couldn't be solohealed anyway.