If you think that getting a penal squad lategame is as an effective investment as a Pgren squad then I'll let you live in fantasy land.
Since you seem to believe that it Pg in late is good investment next time you play as Ostheer build a pg squad in late lets us know how much veterancy it gain facing vetted allied infatry and AI vehicles.
What I have pointed out to you is that bundle grenade argument hold less water than you think.
I am also do not understand why in you opinion a unit that starts superior to other infantries of it time should remain superior in all stage of the game.
Bottom line is T1 and Penals are badly designed and buffing them will really solve their problems. That is why I have started a separate thread about them.