It's actually pretty simple. It'd be really good if you could see the teams immediately, whenever you drop in a match. It'd really improve the viewing experience, since it'll help you to understand certain double switches better. It'll also help the players, since they won't be asked to give their teams 3 times or so (this happens quite often in #Tournaments finals). I don't know how hard it'll be to script anything like this; I know it's on Showdown though. It's only a little thing, but I think it'd be a really handy one.
Yeah, I agree. But your whole team can be seen by anybody if you're battling. There's no "No Spectator Clause" in Find Battle (iirc). But still, its a good option for tours.