So it would lose the apcr round, gain some better HEAT, go up to 2864 main gun dpm and gain a 3173 dpm mws autocannon (assuming reload/intra are the same).
I love the idea of activating some autocannons on WW2 tanks but even at low pen I really dont think a potential dpm that high should be achievable in the mode. Sure it wont come into play against most targets even from the side but for thin armor it still runs the risk of being problematic.
The only way I see high fire rate autocannons working out is to keep them at a very low damage (like 5-8) where they require a majority of the clip to keep a target tracked, wont massively hike up the dpm, and can keep some more pen to be usable against a wider range of side armor/weakspots.