Disclaimer: All numbers and talents are open for discussion and serve as placeholder for discussion so try to reduce on the “Its to op OP/weak” comments. This is merely meant to present the general idea. Even it such a re-balance at this point is unlikely or not in your interest there might be singular talent ideas which could interest you. So take a look at the screenshots as well.
Good, to the actual topic. Currently the talent trees are in some cases rather uninspired and some choices are near non-existent leading to more or less streamlined talent tree. I think the main problem is that the choices are limited between similar effects or similar points. So no matter what you choose you will always have temporary health for level 20. With this said, I propose the following change open for discussion.
Pre-Condition: Weaken the ground state of all heroes so that they are from values near identical with the exception of their specific active and passive skill. Passive and active skill will be reduced in effectiveness too.
Talent trees: “Rotate” the current talent trees by 90 °. You will have now three lanes. The left lane is meant for augmentation of the active and passive skill while the other two are meant for certain playstyles. Mixtures are of course possible as well.
To cover the loss of the initial bonuses the talents can be strenghtened and level 30 talents can be introduced.
Advantages: Choices are more meaningful (do you want a stronger active skill or temporary health), choices of talents allows for more diverse builds and builds are less streamlined, current playstyles are still possible (you can still play ranged but you have now to sacrifice power in other areas), temporary health is still in the game but needs sacrifices in other areas, less discussion about Natural Bond because temporary health is less prominent
Disadvantage: Initial State is very weak making game in the beginning harder, Heroes are not all powerful anymore and have to accept weaknesses if they want to excel in certain areasy, balancing will take a loooooooot of time, half of talents will be broken initital.
I have exercised two full examples for this (numbers and places of the talents are placeholder and are only for presenting the basic idea): Ironbreaker (screenshot #1) and Ranger Veteran (#2).
For some other careers I only showed how the left lane talent tree could look like: WHC (#3), Foot Knight (#4), Pyromancer (#5), Shade (#6).
Like said before, even if you dislike the whole idea, looking at the screenshots might be worthwhile if you look for talent ideas. For most talents there was some (not much) thought put into it. So if you have a question you can ask below the specific screenshot.
With this: Here are the screenshots