This is a valid strategy and as you said, an insane undertaking.

The other option (what Blizz stated they were going to do with the new trees, but aren't quite there yet), is to have your core PvE/PvP talents in each tree, but create choke-points in the trees where you _get_ (not "have") to throw in a few floater points according to your personal style before moving onto the next tier.

The problem with this is most players see it as a penalty with statements like "having to choose something like improved health funnel just to get to tier 3 is annoying" being bandied about.

People have to remember that your spec's raid dps will be normalised based on all the +dps talents. If every talent tree had 31 solid +x% damage to y ability talents, every raider would take them and your tree's mastery/tuning knob would be adjusted to bring you in line with other classes damage output. If however, you have 25 +dps talents in each tree and six floater points (or Fabulous Opportunity Points™) you get to choose some extra bonuses WITHOUT penalising your dps.

The converse is true for PvPers, you choose your ~16 core survivability/control talents and can spend the extra 15 on damage increases to your more bursty abilities, without feeling penalised; because in an ideal world everyone is in the same boat - no one has 31 pure PvE or PvP talents to choose from.

It's not a nerf, it's an opportunity. We just need more floater points and more choices to spend them on.