In addition to the other topic about better Cordials.
I want to bring up another change to GP regeneration

Right now , on lvl 90 you regenerate 8 GP every 3 seconds.

Here i want to make the following suggestion.

Instead of having a fixed passive amount of GP regeneration with passive traits, connect it to the MAX GP you have,
Basic Regeneration (5) + (Max GP/100) = regeneration every 3 seconds.

this means if you have 900 GP, you would regenerate 5+9 GP every 3 seconds.

This change would also make Max GP a more Intersting stat.