I think pretty much every MW plays some sort of spellcleave since it's harder to play with melee jumping around. But I can't see how any comp would benefit from a monk healer over a priest or druid. The biggest problem with monks is that they don't have a lot of spells to use when people are low. They simply spam heals into the person unlike other classes which have some form of utility spells (on relatively short cooldowns/multiple spells - shield, skin, bop) along with multiple forms of CC.
Monks only spells are para which is awful since its low range, not spammable, requires no dots (or glyph) and dr's with a lot of popular classes. Every other healer has some from of spammable CC or aoe CC.
Buffing monk heals will make them op. They already have amazing healing output and if orbs gave chi, you would never run oom. Buffing hots by some sort of dispel protection and revamping their really bad cc might be better.
Our HoTs need buffs. The only time our healing is amazing is with spheres and as I said earlier they are hard to use in the majority of comps.