if you scout TML you will see that on radar, with acu you see only acu and you need to pay attetion if hes upgrading and what the upgrade is.
So normal tml is more likely to see.
With acu tml you can fire quite fast and even faster if you have few engies around. Dont forget that normal TML cant fire that fast even if you have all missiles loaded. Only cybran is fast.
So i disagree with pretty much everything you wrote and imo this is a good change.