I don’t want to be a Russian Dolls maker but 2 topics are already talking about this point (hence other opinions) :
Well my 2 cents :
If i had to make an adjustement, i’d say :
If you already have spec’ in a skill : The next time you do it, the xp needed is slightly reduced (with a cap), depending of the number of points you used. It can be helpful in the long-term. It’s like a system of memory of the character that reminds a little of his previous learning.
If you don’t like the idea, we can imagine a faster xp gain for skills (without being abusive) than now.
In the 2 topics above, i already talked about the limits of interest in early changes in the game (imho).
Moreover, i think that the passive system & skill system shouldn’t have the same currency, especially with gold (not that hard to have, i think i still have 3M). Even if the cost is really really higher for skills, you’ll have to … farm anyway to have cash. So it doesn’t change the fact that you’ll need time to accomplish your changes or it will be quite easy.
Don’t forget that we’ll have a bazar too.
Beyond these points, i think the system will be perfectly fine (impression of choice that matters) when :
- We’ll have better tooltip on nodes and skills
- A Path of building will be available (like evoked by @Llama8)