- Edited
Loumardes Removing the medium reactor and moving the large one closer was a good choice, not it feels like less of a waste. Also, yeah I would use a small reactor instead of that storage, I would also add more armor to the front. Overall much better! I might edit this post with a challenge ship later, be sure to test it AI vs AI and not by piloting it yourself if you have been.
Edit:
After some testing, I've found that your ship heavily lacks crew. The heavy lasers can only shoot close to 24/7 whenever not under fire. If the shields are getting hit the guns are not firing, and that is a problem.
Also, it seems pretty weak to cannons because of this. All of my 1mill cannon walls were able to strip most of its lasers off in a few seconds. I would suggest adding both more crew, and shielding. Try to put the shields under the weapons so you can fit more of each into a smaller space.