JU52 had a gun. If it was brought into the game, I believe it would be used more than the C47.
iI wouldn't. For any fighter piöot but the newest of the n00bs a limited traversable 7.92mm MG on a plane even
slower than a goon won't be any deterrent. You swoop down, one pass, Ju dead. See how the He 111 is still just a victim with even more 7.92mm single MGs.
In capturing bases, bringing troops is all about speed and stealth. That's exactly why the M-3 is being chosen over the much sturdier SdKfz... not because of it's better gun, because it's faster - and thus much better able to make use of the limited window of opportunity.
There's no way a troops transporter will be mor epopular when slower and as easy to shoot down.