Upgrades should always improve the ship! (Burst is a bit broken)

I see the reason behind the consequences of the upgrades and I appreciate that you took the time and effort to think about all of the minute details. However, seeing as most people either don't like this or can't grasp the concept, it may be wise to have an "easy" mode where upgrades do no harm to the weapons, and a realistic mode, where upgrades penalize other aspects of the weapon.