I think you should move this topic to mod suggestions... But! Mod such you describe exists http://www.nexusmods.com/fallout4/mods/7515/? Or very seimiliar to your description and i am using it. The issue is that enemies in PA are almost immortal due to system of damage and author of the mod doesn't update it yet... Anyway I agree with you and i have in mind some ideas about PA overhaul. Of course PA are designed to replaced tanks on battlefields but with such defense power the game will be boring in few minutes. In my opinion, there should be some speed, energy drainage and energy drainage adjustments. PA should dominate a battlefield but at high cost of usage - increased fusion core drainage, no stealth, vulnerability to explosives (not exactly molotoves). Different speeds of PA -> Basic - very slow (almost walking); standard draiage of power, Advanced - running; high drainage of energy. Sprinting in PA (boosting) should exhaust fusion core in few seconds. PA should be designed for fights against hard enemies - deathclaws, robots, PA enemies and create additional power for really tough enemies which are not defeatable at standard recon mission. Different abilities and characteristics would be also nice for power armors like that X-01 is faster than standard PA. Raider power can use longer fusion cores etc etc... Abilitiy to wear clothes under PA etc... Also - 0.50 caliber has no primary usage in vanilla game, unless you modify your huntig rifle - there is oppurtunity to design this caliber as only ammo which directly penetrate the PA and cause harm or best ammo to crack down the PA parts to make you vulnerable... CHeers! Lukas