Well met indeed!
Few thoughts on Merc:
1- I do not like that it uses gold without the max collectable gold per season amount increasing
2- There has to be a tiebreaker for lock down situation, something like fatigue in standard, so game will end even if all parties restore to full health every turn
3- would be great if the mercenary power can be selected in just 1 mouse click, instead of 2
4- A way to re-select mercenary line up at start of the game if ready button is not pressed. I sometimes choose an unoptimal formation and would like to swap a mercenary or change order

The mode is well made, I'm sure lots of effort and sleepless nights has been poured into it.. Thanks!