One thing that I like about our development, and the entirety of the SS13 community, is that each server is independent. The codebases may share some similarities, yes, but eventually they stray far enough that they are very unique in the gameplay and functionality. Yes, it's good to adopt some things that become popular such as the speech showing in the game window, but other things not so much. I believe this is one of the latter implementations. Where it does, for a lot of people, impact the game and feel negatively. Just because other servers have this implemented successfully does not mean it should be here, nor if it can be implemented will it be 'successful' as that definition is opinion.
And I think it's a lot of people's opinion that this is unneeded and even disorienting, and the few benefits to stealth that we get from this we take away in other areas. I'll reiterate what I said a few pages ago regarding us trusting the player. We should trust the player to make the appropriate choices regarding appropriate vision cones and 'presence awareness'. For example, knowing that someone is behind you because you haven't heard them walking away, you're able to do so by seeing their sprite still in the same area. I don't think this is something that needs 'fixed' because it is not broken. We're adding a literal blinder to the horse that is the player instead of trusting them to make the right decision on what direction is straight.
Once again, stating my own opinion, I think this is disorienting and extremely annoying in any aspect of roleplay, from chairRP to heavy combat.