You know why you don't see flame HT's built against UKF in tournies? Because noone plays UKF in tournies. The matchup is already pretty in favour of Ost which roll UKF early game without the need for more Ost buffs.
If you had played more than three UKF games in matchmaking you would know this, 222 gets built against you in pretty much every single game as it's a delete button for your bren WASP.
Speaking of tournaments I saw pretty great use of the 222 against USF in ESL, guess how much use of UKF we saw (oh wait I just mentioned that didn't I)
If it was in need of a revamp it would never be touched (just like the sexton or *cough* Greyhound *Cough*)
We can't compare the 222 in a vacuum but we also can't assume everything would be completely static.
If X needs helps against X due to X then that should be looked at and adjusted accordingly. People assume that if X unit is changed X will never get changed and that's honestly bad for balancing and so many factors enter which no one even accounts for.
It's like how everyone conveniently forgets the 222 would be more expensive giving lighter vehicles like the M20 and M3 time to roam around