Hey bro, currently the interactions that can be made when acquiring a skill from the tree at the cost of License points are: Stats, Learn Skill, EX-Param, SP-Param, Unlock weapon and armor, and Trigger Switch. To meet your needs, I'll need to update the plugin and the auxiliary tool to allow a node in the skill tree to trigger a common event. This way, you can configure a common event with an increment based on the value of the variable you need to modify.
I believe this will work correctly for you. I have some other demands that need to be implemented already on the list, but I'm willing to work on them this weekend. Let me know if this solution would work for you and I'll start working on it!
I'll probably post a devlog with this change, but I'll let you know here as soon as I implement it.
Thank you for your message and interest. The idea you brought has the potential to enhance the plugin and make it more flexible. Thank you very much.