This is a neat mod, but it really needs balance work. The changes to combat basically make most weapons worthless. Rifles and Pistols serve almost no point. Snipers are weak. MGs and shotguns are the only things that seem to do much damage. Some of the weapons are so specialist I will never use them.
In addition, the mod is more complicated than it needs to be to the point that it just isn't very fun. There is simply too many things to research and manufacture. A lot of the weapon classes are just as worthless. You should probably cut some of them. It is nice to have a ton of options, but there is a point where it is just watering things down.
It is the same with research. You have to capture so many aliens it can cause odd research plateaus. You have done all the research to get X tech which seems logical end, but if for some reason you missed a single alien type everything in an entire tree grinds to a halt. Perhaps I need a casearn weapon specialist. Don't get any missions containing that alien for a while. Instead its all robots. I end up stuck in the tree for months. I find myself save scumming just to ensure the single alien survives a fight not because I need to scum, but simply because it is just so annoying to have to track down one alien type to complete research trees.
Also this game needs to integrate fire in the hole mod. The main alien tactic is to camp at the door and open it and fire shots then close it. So they all just line up next to the door out of cover. My explosives seem to do nothing to break down doors so I have to resort to sending a sending in shield guy to open a door and let them all reaction into his shield and then pick them all off. It has happened nearly ever corvette and landship mission I have done. It hardly feels tactical.
Again, I like a lot of things about the mod, but in the end it just is more annoying than fun. The changes don't really make things much harder it just forces me to min/max items and use chessy tactics to get ahead.
I would recommend changing some of the research paths to try to make them more logical. Remove the different types of alien captures and condense them in universal X specialist, officer, commander etc etc. Make different alien types give a damage bonus. Re-evaluate weapon balance and try to give more use to different weapons trees and maybe drop some types. Remove the need to construct replacements of certain items.