This, sorry for the lack of the specificity.
I think they scale terribly into late game.
Invised posts for excess flame
Wow that devolved quickly. Anyways a lot of sturms dropping off like stones has to do with weapon upgrades. BARs/brens/DP28 boost combat effectivness of sturms opposition so much that they get out gunned massivly if they attempt to close the gap. That coupled with the fact they're just worse pgrens, don't have their DPS shifted to weapon upgrades so they lose larger % of their DPS when models drop etc, makes them just meh unless they can sit around shotblockers. They also have too many roles to fill which makes it hard for them to just camp shot blockers as well.
I think the unit would work better if we made them complete Pgren clones but made their "Pgren StGs" upgrades that they could buy at a similar time Pgrens would come out. That'd help with scaling a bit better since Pgrens have no problem in that department. Or just go the easy route and making their veterancy bonuses final result equal to that of pgrens.