While Panzerfusiliers are great in and of themselves, I find the officer as more of a bleed or waste of precious mp for OKW in 1v1 early-mid game. Late game however I may call it to help with retreating vetted enemy squads or when I have a good blob of vetted fusiliers out that need extra dmg love with the officer stationed nearby if needed/when I have the extra mp.
actually, while idd being quite a bleed if you dont be careful in the earlygame i had big success with the following build today.
Sturmpio ( starting unit )
volk
pio
t2
sturmofficer
Support gun
ATG
Füsilierspam
Helped me turn the early engagements into my favor - the officer buff and also its earlygame fighting capability are immense