I get that optional build argument but they could make the talents so good that there would be atleast 2 optional builds. Then there would still be a chance of some choice. There are a few MMOs that have around 3 - 4 viable builds for every class and you just have to chose your playstyle. I think it could work here too, they would just to have to put a lot of effort into the talent system and not make half of the talents just fillers that no one will chose.