The "fix" for Tn panels is how you have it set up on your desk. I watched my old room mate play on his SamsungBw20" for 8 years with no noticeable gamma shift, especially in games. We are both old and come from the days of crt. And have both had some of the best crts made. But Tn shift can be almost completely eliminated, especially on smaller panel sizes. I have one right here and can do the same thing. You can't just plop it flat on your desk and stare straight at it. You have to be the right distance and it has to be at the right angle. But yes the colors are no ips.
But you go into it knowing that is the compromise. Unlikely i would play any online shooter on most if not any Ips panel 144Hz gsync or otherwise. They are just too slow in response. Some Tn's are too. But overall depending on the type of gamer you are is what kind of panel is probably best for you.
Competitive fpsers would play in black and white if they thought it would give them an advantage, if that's not you, then your goals are different. If you are also a console gamer and can game just fine on slow ass tvs, ( i hate consoles and tv gaming) then ips is probably perfectly fine and the best choice for your gaming needs. If you play CS, or Battlefield or COD or Quake. There is about zero chance in hell i would use any ips. It's not about colors, it's about performance in that case. And Tn can be perfectly fine as long as you aren't comparing it directly to an ips panel. There is no point in that anyway.