To clarify: they wouldn't be build from T1, just require T1 to be called in, so the first Osttruppen / AG squad would still arrive at the same time as live, because the recharge starts at the start of the game, not once T1 is built.
Thanks for the clarification I misunderstood.
So Ostheer not only will not have mainline infatry available from T0 as other faction have, but they will now not even access to Doctrinal T0 unit without T1.
That make little sense especially since some of the problems Ostheer actually have start with having their mainline infantry arriving the latest.
Moving them to HQ is a far better solution since their timing will be the same regardless of map.