So even though i have a fully upgraded med bay with a full crew working on it, I still cannot pump out enough med kits to keep up with how many I need to use for the Radroaches and raider attacks that happen way too often for me to keep up. It's just stupid. I just spent about $2000 to revive a bunch of my dwellers that died from radroaches and I am STILL down six. Now my vault is running inefficiently because of all the dead, and it'l take me who knows how long to be able to afford to revive them all, and of course i will be pounded with roaches and raiders during that time just making it that much harder to pull ahead.

needless to say this is pretty annoying to the point where pulling out of this slump comes across wayyy to much as work than it does a game to kick back with and have fun. And no I'm not buying my way out of a hole with lunchboxes, because I'm not rewarding the developers with my money for creating an imbalanced game that results in these sorts of instances so you feel like you have no choice but to spend money to get balanced again. I'm not that much of a fool.

It sounds like you expanded and upgraded too fast. It is better to have a measured approach and only upgrade after you have sufficient resources to support the new rooms and dwellers. It is very tempting to spend all your caps and upgrade stuff as soon as you have the caps; I made the same mistake myself in one of my previous vaults. Unfortunately, I had to scrap that thing and start over. Now I make sure I have dwellers with weapons and outfits and proper stats before I dump them into a new room. It has worked much better. Also, don't upgrade the rooms too fast either that is asking for trouble.

MMZ>Torak Stats don't matter in combat inside the vault. The only two things that matter there are level for how many HP you have and weapons. Test it out. Get 2 characters with dramatically different endurance stats and put them in the same room to fight raiders. Both will take the same amount of damage.

Currently stats are only used for combat outside of the vault.

Fair enough, but do stats affect leveling? Do properly trained and equipped dwellers level faster than their unarmed, unarmored, and untrained compatriots?

The only place I can confirm that it helps with leveling is outside the vault in the wastes as you get more XP for a successful encounter than a failed one. Haven't tried testing it in the vault to see if that matters.

Personally I'm just keeping my lower level dwellers deeper in the vault so they don't just quickly die to attacks.