The next game will really depend on the skills. If they are also underwhelming at master level (which is not necessarily a bad thing... I kind of like it that way) then there is no point to changing it again.
I have the opposite opinion. If D:OS2 also has underwhelming skills at level 5... Then it should go back to the system in the original D:OS. Otherwise, there would be no point in ever getting an ability to level 5. With unlimited skills at level 5, even if the master skills aren't that great, we have a strong incentive to dedicated that many skill points to a single ability. Otherwise there would be no point to that ability level.
