Well, that's your opinion.
I think it adds a nice flavor, gives them something extra and keeps them unique defensive troops instead of assault one as opposed to vanila ones.
In fact, I do believe more upgrades should be side-grades like this one, where you get something and lose something not for better performance, but for different one.
Well, that's your opinion.
Why HGB tho?
There is only one player in the whole community who complained about it - you.
It is simply impossible for you to avoid going personal eh?
The number of player bring up an issue is rather irrelevant. For instance I brought the balance problem with changes to the HMG-34 which was listed as "bug fix" and had to deal with heavy opposition
https://www.coh2.org/topic/65093/hmg-34-in-dpp
and not only they fixed the issue, they even further buff the hmg-34 with veterancy buff recently.