Can you enumerate those 3 units and explain how you used Penals in WBP in a way that makes those other 3 units feel irrelevant?
I think you misread where this "discussion" originated from. It began by me responding to
a post that said Penals being an all-rounder (flanking+mainline) infantry through access to different kinds of upgrades (which was tested in previous iterations but is not the case in 1.7) is a desirable balancing method. I responded by saying enabling them to be Swiss Army Knife would make other Soviet infantry (Shocks who are considered a flanking squad and Conscripts/Guards who are core/elite mainline unit) redundant, in addition to removing all historical reference from Penals, something I had
commented on previously before they were made reverted to be less all-capable by your team, which I'm grateful for.
That discussion later degenerated into ad hominem attacks by another user who decided twisting my words to suit their agenda was a great decision as they were incapable of countering the point made.