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

I should add that I agree that burst having a detrimental effect in other areas is acceptable - it's too powerful an upgrade not to have some drawback, otherwise it would just become a 'correct' choice, and thus not a strategic choice. However, burst sometimes brutalizes other stats. In many weapons, particularly many of the less expensive starting weapons such as energy and projectile cannons, there is almost no possible way that purchasing burst can be advantageous.