I don't expect single target combo weaponskills to have MP costs, but I would be equally surprised if the devs plan to let you Overpower and Total Eclipse with impunity. There are other issues as well. Unmend costs MP. Shield Lob and Tomahawk cost TP. So either all these abilities are going to become free, or they're all going to have an MP cost. It's a bit more nuanced issue than simply "remove all TP costs."

I don't think that battle raises are necessarily a problem if there are limits set on either the number of times that non-healers can battle raise, or the recast time of the spell. That way, it becomes less of an issue of replacing a core healer function, and more of a clutch cooldown that you can use in a pinch.