Idk, my only gripe is that Eagle recharge upgrade does not scale with how many charges you have left. Maybe 5% per unused charge instead of flat 10%?
Fair take!
It would open up a wierd minmax opportunity, but is it really an exploit/imbalanced if you deck yourself out with 4 Eagle stratagems of which you're only going to use 1, but with close to 50% recharge bonus?