The new healer will look very much like the other three in skills with just new effects. Mainly due to the fact that the community will shout and yell if they are not the same thing as the current three. Anything that might set them apart will have to be so diluted as to not make them in any way better than the current three.

So they will have some form of HoT, some form of shielding, some form of buff/WHM lvl DPS, and the ability to burst heal due to this games love of burst damage.

WHM has no shield, they screamed about SCH shields so they gave WHM a shield skill all be it slightly different. AST cards set them apart to much, so they nerfed them down into meaninglessness. Now all three healers are perfectly inter-changeable and no DPS or TANK really cares what symbol is in that green square so long as they have a green square.