I'm aware of the Osstruppen trouble in 1v1, but I don't see much gain in those changes. The cost increase seems negligible (player has to float anyway because of the recharge timer) and adding 10-20s to the the recharge timer itself would force the player to float 350-410 manpower after building an HMG 42 before being able to deploy their first Osttruppen squad. Those sound respectively like inconsequential and overnerfing changes to me on first sight, especially when combined with the T1/BP1 switch, but I don't play 1v1 or Osstruppen so correct me if I'm wrong. Otherwise I'd be happy to try them.
The reason I recommended the Master League discord is a lot of players had interesting perspectives on Osttruppen in the players chat which could be useful.