So I just unlocked the Stealth Cruiser and decided to try it out, and all afternoon I was having a extremely difficult time on normal, and I couldn't figure out why. I looked up tips for the Stealth A, and I followed it, yet the entire time I couldn't get very far, and even if I did survive the first few sectors, I was severely underpowered and die in the middle. I got very frustrated so I took a break.
Then I realized, Say 966socho, didn't you install a few mods yesterday? Could that be messing with your runs? I went back and checked, and what do you know? I had the Weapon Diversity mod up the whole time! That made the Dual Laser I started with cost 2 power instead of 1, so I couldn't get the Mini-Beam up early and start cutting apart ships. I was able to win in one run after disabling it.