In a way I think that it would be better if the door to Glacier would be moved from the shop to somewhere else. Maybe the Devs could add a special room to the Basement that would have the door to the Glacier. Having a cold room in the Basement would be really cool.

this would be an amazing idea because more people would go to these rooms, be honest when was the last time you went to an arcade or angel room, maybe not the devil room but all the others are fine

sacred heart and godhead, blood banks and demon beggars

I'm against the entrances being in secret rooms because if you get unlucky and run out of bombs while trying to find them, then you can't access the floors. I would also like to see the future chapters floor entraces be available regardless of whether we enter the Glacier, like how Antibirth lets you enter it's optional paths later in the run if you can't get to it early on.

Also, arcades arent guaranteed to spawn.