I'm going to turn your question differently:

Do you like MCH?
If yes, go forth, brother.
If no, that's okay, one day the MCH will have its expansion where it doesn't suck.

If you want to go to RDM I have a good news and a bad news for you.
Good news: You'll do as much as RDM as a MCH.
Bad news: RDM isn't that great.

MCH went from "Complete garbage" to "Worth the 1% stats" (Not yet sure about that but we'll see) as all the melee and SMN got a neat buff, we will have to wait until numbers and stats to know how the patch impact the raiding environnement.

Overall the MCH should have been buffed by a 4% DPS increase, we'll probably stay far from the ideal "ranged tax" but we should stay above the garbage floor, aka "DPS so low you'll do more DPS by playing BLM with one hand."