Mainly that the biggest chunk of ACT 2 gameplay will be a bit too claustrophobic.

I'm finishing my 2nd playthrough right now. Seeing grymforge for the first time. It feels absolutely epic so far. The map design, the forge golem boss ( forgot his name even if I just killed him.... the guy guarding the forging device itself). It would be extremely akward instead of epic if that entire city was just chilling next to the mushroom colony just a few hundred meters away from the grove and hag swamp. Some space in between the locations even if effectively it just adds loading screens and nothing else feels a bit more organic to me.

Alt+ left click in the inventory on an item while the camp stash is opened transfers the item there. Make it a reality.