I can say right now that if we took out invurn there would be a lot more people than just you angry at us and demanding we change it back.
This game is different. There are different strategies involved and learning to adapt and compensate for them is part of the game. Yes, that means automatic weapons aren't as powerful as they would be traditionally. Yes, that means that better weapon/more health = higher chance at victory. However, these are elements that contribute to GE:S being a new experience rather than another "modern" shooter.
We've tried the exclusion of the invurn mechanic, and it just didn't work. We've been working with this game for half a decade now, we've established what works and what doesn't. While it is true that there are several issues with our mod, they are more so kinks to work out rather than issues with the core gameplay.
I really don't see why this is still going on. It's been explained as to why we've kept this mechanic and why it works. I don't see how you could go on saying the game is just a "run and gun" shooter with no skill element when strategy is one of the most important things to keep in mind when aiming for a good performance. Correct use of the radar and the prediction of enemy actions allows you to know where everyone will be in 10 seconds and how you can take advantage of that. Most of the experienced players in our mod have about the same relative performance as the pros in other games. Sure, jumping in someone's face or ambushing them don't work too well with the invulnerability and radar, but this only allows for other tactics.
Notice that the definition of skill is not constant across platforms. In some games, it's about having good aim. In others, it's about reflexes and tactics. In our mod, it's about awareness and strategy. Just because the skills you've learned in counterstrike don't work in GE:S doesn't mean that the game lacks a skillful element, it just means you haven't honed in on it yet. Some people want a game that caters to good reflexes or ambush tactics, but GE:S isn't designed for that.
Really, all i can say at this point is that our mod isn't trying to be COD or Counterstrike. I don't see why you want the elements of one game in another one if you can just play the first one. We're giving you a new experience, just because it's fundamentally different from the shovel-ware produced nowadays doesn't mean it's not as good.