Simply add the ability to promote infantry to LT and Captain.
It could work a bit like refit, the ability is activated by the corresponding tent in the base removing the infantry and returning an officer for the cost difference.
(mechanism can also be used to train doctrinal infantry)
Shared veterancy and passive sprint should be removed from fighting officers.
Why not make it a timed upgrade for a rifle squad? Maybe even have it just add another model along with the requisite weapons/abilities instead of changing the entire squad. As long as you could only have one, I think a 6 man squad would be cool.
I like the idea in general but sadly it’ll probably never be implemented.
I do think that usf is not at all well designed to be skipping tech. Case in point: the bonkers decision to give lieutenant tier no reliable at options but two suppression platforms and captain tier no suppression platforms but two reliable at platforms. It’s definitely the worst designed tech system overall and the most expensive to backtech at the same time. It’d be nice to see a well thought out linear system make it into live like this, as even with all its vanilla units, usf still lacks some pretty core elements of an army (flamers, normal mines, heavier armor, snipers, early ultralight vehicles, variety of nondoctrinal combat infantry, etc.), some of which is made up for and some of which is sorely missed in usf’s lineup, more so than any other faction except maybe brits.