You can click on the bottom right icon under the portraits to select all characters; faster than right clicking (the tab key will also bring up the character menu), though is not as handy as a hotkey would be.
I'd also like a hotkey to re-centre the camera on the active character. The F1/F2 keys work to select / re-centre for individual characters. A 'select all' hotkey would be good enough, though I would like a single re-centre hotkey that works for either individual or party selections.
Either character can use potions from either inventory, so there is less need to swap them around.