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

Lurkily, there are no wrong choices in upgrading the weapons. You basically said it yourself, it's about combining the upgrades strategically. Burst generally goes well with the damage upgrade, but if you want a fast firing weapon, burst is an awful choice. It's about the strategies behind the upgrade. It would be far too simple if the upgrades didn't have realistic consequences.