In a game where buffed riflemen and 7man uber cons rule the battlefield, you can’t nerf the mainlines on an already struggling faction.
Unless you’re ready to buff Spios and Obers in return, which nobody wants.
Both of those units got buffed because of their cost ineffectual status compared to volks. Sadly 4 man Tommies are in the same boat where their cover reliance is hard countered by volks out right
Buffint sturms and Obers are actually a much better way that rifle lite volks.
As long as volks are the only infantry you really need (despite there being 2 other ELITE stock units) something is going to over/under perform relatively. This is part what happened to the buffed doctrinal elites: how do you make a unit a reasonable cost and attractive when volks are so cost effective as it is.
Sturms being cheaper but more flexible and covering the anti garrison role would add some much needed diversity. Tuning stgs so they are not a good at all ranges makes long range Obers more attractive. What's more, if the bulk of okw infantry isn't going to tackle every single battlefield problem with the utmost ease, other units from other factions can be adjusted so that they don't need to compete as hard with Volks.