In my opinion, panzerwerfer, katiousa and calliope need a big nerf, specially the calliope. There is a problem when a player strategy is only to get calliopes and it works better than a mixed units strategy.
Also, i remember one of last patches was in order to avoid these kind of tactics, for example, to wait till get only heavy tanks like is2, tiger, etc. Perhaps would be good to limit these arty tanks as relic did with heavy ones.
GG WP
Agreed. And Panzerwerfer has better stats than Calliope in addition to suppression, cheaper pricing per unit. Katyusha doesn't need a nerf but Calliopes and Panzerwerfers need the nerfhammer ASAP