Here again what is the point? With your proposal everyone will be forced to rush the stuart since every OKW Lvs is going to hit the field faster. I mean it is not like there were no reasons for the balance team to delay the Luch behind a 60 second build.
Or build an AT gun, an AAHT, stick a Bazooka on the Lieutenant, get the bazooka on the Lieutenant, lay mines or save their munitions and tech racks.
It makes a pretty minimal difference to USF. Just build your counter a unit earlier.
It's UKF and T1 SOV builds that'll notice the difference.