As a WHM main since 2.0, I personally enjoy rDPS a lot. A new rDPS would be welcome.

However, we desperately need another healer. We currently only have 2 healers, and anyone trying to meme in PF will see the abundance of green and blue open blocks. A new tank is great and certainly needed, but healing is in a sad state. You need an AST and a SCH, and ONLY an AST and SCH. As much as I love healing, this gets super stale. At least with tanks, there are 3 combinations you can use, and each changes how the two plan and use abilities.

TL;DR-- Dancer as rDPS is a good idea. Not having a new healer is a bad idea.