[Randallw]

I have tended to jump to the next level when it becomes available. I did come across a reason to stick with a particular class though. When I reached lt cruiser I noticed it takes less engines (heavier ship means it is slower. BalanceMod I believe). So if you want to have fast ships for scouting or as escorts then it makes sense to keep researching destroyers so you can have increasingly more effective ships at same speed.