So why not do that? If you bundle BP3 and T4 together, you free up a Battlephase. That lets you insert a teching slot between T2 and T3, fixing the longstanding problem of where to put the Puma.
This is Ostheer's current teching structure. The number in brackets includes the cost of all that tech's prerequisites.
Oh, and to clarify, this is not a faction overhaul. This is shuffling tech prices around like happens most patches. All units arrive at the same time.
Current Tech Structure
Proposed Tech Structure A
Why not reorganise it like this?
All the unlock costs (including teching both T3 and T4 together) are exactly the same, but now the Battle Phases are much more evenly spaced.
Battle Phase 2 doesn't do anything in the nondoctrinal roster (just like Battle Phase 3 doesn't do anything in the live version), but it's an island between T2 and T3 where you can put the Puma and the StuG-E.
Proposed Tech Structure B
Structure A inserts one timing window between T2 and medium tanks. Structure B inserts two, and gives every tech a purpose in the nondoctrinal roster. It also provides a means to buff Ostheer in 1v1 without powering them up in teamgames.
To keep the timing on the T3 units the same, you lock them behind Battle Phase 3.
Any T3 unit you don't lock behind Battle Phase 3 comes 100 MP, 55 FU earlier. For example, if you didn't lock the StuG, Ostheer would be able to deploy a counter to enemy light vehicles that much earlier. That could be a good buff for them in 1v1 that shouldn't affect team games (where they usually have OKW and tech up faster anyway) that much.
It's also really easy to implement this one: all you'd have to do is change the costs of the techs and lock a few units behind BP3.