Hi everyone,
Absolutely nothing has changed in the way skill points work. We are aware of some of the imbalances regarding the attack, partially resulting from the O'Shea boss and partially due to previous money problems. With these issues, we've decided to speed up our work a bit and try to launch the next expansion earlier so we can address both the defense and the money imbalances. There's also something major coming to the Boss fights part of the game which should also help us with re-balance, but I can't say more than this for now.
Again, nothing has changed with how skill points affect the game and we're working to bring everything back in balance. Thanks.