And invited some nasty burns
As always, I'm betting the soldiers inside the Hetzer were able to adapt and overcome the obstacles of loading from that side and minimize any design flaw. IIRC, the Hetzer was not originally meant to mount the 75mm PaK 39 L/48 gun, but instead a different gun, which one I do not remember. The 50mm KwK 39 L/60 maybe?
I do have to say that I am surprised that HTC went with the Hetzer instead of the StG III. If they would have added the StG III then the Panzer III would have been that much easier to add.
The StG III could have easily provided three models: the B, G, and F models (similar to the Panzer IV lineage).
Regardless, I'm glad HTC opened up a new area uncovered in the AH world: turret-less AFV's (the M3/75mm doesn't count). I look for the Su-100 to be on the horizon, and maybe perhaps the StG III as well.
Now... about adding the Wellington, SB-2, Beaufighter, Soviet SB2, Yak update, B26 update, Ju88 update, etc.