I will be frank, I believe the argument you are posing is a bit disingenuous. You fail to realise that immersion is a real factor when roleplaying. Dumb me all ya want but I find having to stop in the middle of a battle to type in a lengthy fucking paragraph to my Squad Lead, only for it to be cut off at the character cap, is terribly un-immersive.
I go through the points 1 by 1 if that makes it easier.
1. "it is literally covered by using TS or Comms"
a. TS are primarily used OOC. While battlecomms may be enforced, they lack the actual feeling of "commsing"
b. Again, this would be used for small squad operations (I would say 3-6 ish), not a substitute or replacement to TS by any means
c. There will still be people who aren't in your squad, so /comms would still be utilized.
2. "x-ray is literally absolute horseshite"
a. I don't quite know what you mean by this. I will assume you are just a proponent of this addition. That is fine, frankly, don't care for it either.
3. "maybe try not to shoot your own teammates through, ya know, stopping shooting when they're infront of you"
a. Compensating for GMOD physics and player hitboxes in a CQC environment is near impossible. If you have any player count over 60 you'll start feeling the affects.
4. "seeing health was already shot down heavy"
a. Medics seeing EVERYONES health was "shot down heavy". Again, I understand that this feature may seem negative at first. HOWEVER, all these features, if implemented, are toggleable, If you don't wanna see your squads health.... don't use that addon.
Once again, all these features are toggleable, with the direction this server is pointed, and the freedom of RP many want to have, who are you to say that they shouldn't have that option? If you don't to use it, you don't have too. What may enhance one's RP experience, may not do the same to yours, and that OK!