I think the best thing I could have done is giving enough money to try out different upgrades. A fully upgraded gameplay felt too easy for me.
That use of dash around 40% or 10% while in air is intended. There will be some levels design around that feature. Player will have to use the last 10% of charge to dash to cover remaining distance. Ground blast will send enemies flying off to greater distance giving you time to walk around and recharge some fuel. But only deal 4 point damage (multiplied by attack power).