ARC having the healing LB isn't really a bad thing and it can come in handy if say the whole PT is wiping and only the RNG is alive with lvl 3 lb full, whole pt is back up. but yeah thats my 2 cents on that.

For SMN it would be cool if whatever pet they have out turned into it's full form and used it's ultimate move but thats alot of animation/coding ect. plus would look weird if your fighting a primal and then theres a 2nd one >.>