It doesn't remove a risk of skipping, it just make you safe from brainless rush with LV like stuart ot T70 which caused a lot of mass-retreats before the patch.
Schreks as well as zooks are quite innacurate, especially on max range, and their range is lower than range of LVs main guns.
With the same logic you can call tellermines existance without T2 as "bad design".
It doesn't remove the threat from skipping, just makes the you safe from the thing that punished skipping.... got it.
Shreks unlike zooks however require an entire shot less to kill a light meaning a single squad and some good RNG can end a light in only 2 volleys. Also I'm not sure why you are now making them out to be ineffective when just a sentence ago you said they make you safe from LVs. If they don't like you claim then there is no reason locking them behind the tech will make a difference, but if they do, also like you claim, then it makes skipping t2 viable and without risk.
And here we are with further conflicting claims. Previously the short range and inaccuracy was an issue that made the Shreks unreliable but now a range and accuracy of "the enemy quite literally has to come to IT and touch it" is comparable.
I'm starting to think you are simply grasping at straws here....
All but brits are supposed to miss out on something by skipping tiers (cause brits are entirely linear, although they can miss out via side techs) pgren Shreks negate that design philosophy. Previously the skip carried the risk of being carried off field by LVs, that threat is now gone and calling it t2 skip isnt really an appropriate name as it has made t2 an optional tier entirely. You are not skipping t2 by going from 1 to 3,you are instead side teching for t2 in the same way the Soviet might by going t1 to t2. Except without giving up any real unit as Shreks are as scary as an AT gun due to burst potential where ptrs are more defensive in nature.