Ship Upgrade Choices

I really wanted to say this now as the game gets closer to release and I'm scared that this feature could stick: the choosing of which ship will be valid to use later on needs to be retought.

At the moment one has to choose which class to upgrade to make it viable for the later game, but this totally kicks out the other ship, one will never use it again. I can understand why the idea of choosing your spezialization is amazing, but wouldnt another option be that one chooses one of the upgrades and the other one can be researched a Technology-Stage later?

Its still an important decision, but it wont make the player choose the attacker first and the coordinator later (or the other way around) and forgetting that the other two ships even existed... It would be a waste to only be able to make an effective fleet from 3 ship classes.

[Another idea would be that there are 3 or so specializations to choose from for each ship class {like a projectile or energy bonus for the attacker} a choice for every ship to strengthen and put it into a better role for the later game]