The talent tree rework has shaken up things quite a bit for Resto Druids in PvP. Looking at the forums it seems the rdruid player base is relatively divided as to the usefulness of Invigorate in Arena. I’ll spare you my own stance on the Invigorate vs. Germination debate, but the solution for this seems straight-forward to me.
Why not make Germination and Invigorate the choice nodes at the bottom left of the tree, and bring either Deep Focus or Circle of Life/Death to the current Germination spot (bottom right).
People who currently prefer Germination are given the illusion of choice, as they would have to drop other key talents in order to reach that far to the bottom right, which is simply not worth it in most cases. Making Germination and Invigorate a choice node makes it a more reasonable choice for players, and gives people the option to opt for either the HOT-heavy build with Germination or the more bursty healing build with Invigorate.
Choice good. Pidgeonhole bad.
Disclaimer - I have no idea what the implications on PVE would be, regarding my suggestions.