This is nothing new. It is the same system as first game with some changes ofcourse.
In principle you can choose of being super good in one school of skills and dont use anything else. Or be so called jack of all trades.
There can be space for both in one party, because you are limited to 4 characters. You cant encompass all schools of magic and all skills if you dont have multispec characters.
Anyone can choose what they want.
