80-90% of what you wrote is doctrinal.
That makes me think you never made it to the end of my post, because I specifically underlined that.
The author of the post wants non doctrinal stuff. You can't compare doctrine for ost and non doctrine for UKF.
I know and its not relevant, because there are all the options he wants specifically made for doctrines already.
Stock grens are long range DPS squad that excels from cover fighting, but is reliant on support from other units.
Picking right doctrine makes it much more independent in a way you think you need, so solutions to his problem already are in game. And they aren't going become stock, because infantry flexibility is NOT design of ost or axis at all, contrary to UKF, which is very much supposed to be flexible, scaling and reliant on strong mainline. While UKF was introduced as allied response to Ost, weaker early game, but strong late game, that's where similarities end, ost isn't reliant on grens to the point UKF is reliant on tommies. Ost got much more options to support grens and they are meant to use them together with grens, UKF is build to have a very strong, but not so numerous tommy force that can be supplemented by much less cost efficient support weapons, that's why HMG42 is much more efficient then vickers, that's why ost sniper is much better then UKF one.