I'll be the one who disagrees with this suggestion, I don't like the idea of spending SP on things like kaioken and transformation, because even those few sp points can change a lot in your build depending on your class...
Yeah, but it's still the player's choice if he/she wants to sacrifice points to spend on the transformation (or whatever they want to spend them on). It's what builds are all about, enabling everyone to be different and play their character the way they want to. Maybe to some people, using those points there might "change a lot" in a good way.
Given the fact that the classes will be balanced out in the end (maybe some skills might even take less points to max out in the future, who knows), you can rest assured that it would stay that way, if this idea does get implemented.