Universal Skill Limits

I made this because I feel the vanilla game pressures you into wasting skill points on skills you will never use just to reach one or two skills at the end that are necessary for your build.  This is overly punishing, especially considering that you are punished enough for slotting skills from multiple skill trees too much because you sacrifice mutagen bonuses which are crucial to a strong combat or sign build.

There are three versions:

Easy 

Skill requirements are not modified.  In essence, same amount of points required to unlock each branch except unlocking one tree's branch unlocks it for all of them

Level 1 skills - 6 points to unlock

Level 2 skills - 12 points to unlock

Level 3 skills - 18 points to unlock

Balanced (recommended)

Skill requirements are increased slightly to balance the fact that you are now able to reach more powerful skills in several skill trees more easily.  Reaching the last tier of skills will now require 30 points (up from 18), meaning that you will have to unlock almost two full trees worth of skills to get to the most powerful skills in any of them.  I feel this is balanced (or even too generous) considering you should have over 60 skill points just from reaching the end of the main quest, leaving plenty of room to reach the last level of skills.

Level 1 skills - 9 points to unlock

Level 2 skills - 18 points to unlock

Level 3 skills - 30 points to unlock

Hard

A slightly more punishing version, though not much worse than balanced is

Level 1 skills - 12 points to unlock

Level 2 skills - 24 points to unlock

Level 3 skills - 36 points to unlock

There are a few visual bugs.  You may still see a locked symbol to the right of the skills even when they are available for purchase, and the number of skill points required (to the right of the skill tree next to the locked symbol) will be inaccurate.

Please let me know if you find other issues with any version of the mod.

Installation:

If installing manually:

1) Download one of the three files based on your playstyle

2) Right click, extract all (or "show more options", extract all)

3) Place the new unzipped folder in your Mods folder, location in your Witcher 3 installation folder

Any mods that edit PlayerAbilityManager. WS will cause a conflict.  They should generally merge automatically with the Witcher 3 Script Merger.