Trying to add some lvls of skills like refire time of snipers, amount of barricades, recharge time of bait etc. i found that it has fixed amount of upgrades.
Like, i can upgrade merc's running speed only 4 times or so.
How can i make this upgrades amount bigger, 'cause it would make a little more intresting playing with high amounts of points needed to win, when you always have your forces getting upgrade and not hitting the max amount of possible upgrades in the begining and then playing with all the same units.
For example, i would like to have maximum 19 levels for barricade adding +1 barricade per level up to 20 instead of having +5 barricades per level to reach desired 20 only in 4 lvl-ups.