Thanks for the suggestions!
1) (Edited) - For now bumped the starting number up by 1. I'll have to look at it and evaluate if changing it to the original space mines thing will work for this game. Defense works a bit differently here than it did there.
2) Ah, yeah that does seem rather under-powered now. I'm going to bump the number of points to active crises and also have it give a permanent decay reduction
3) This is already fixed by some changes in the upcoming update. Now the laser will charge up when shooting the same target and do one larger shot all at once.
4) Agreed, that is probably a better idea. Adding it to my list but it might not make it in the next update.