Some way to do AOE healing or other statuses to a given team/class
Bedwars / Tunnel rats in Lockdown would be cool (Getting point ownership to lock opponent's spawn or something similar)
Is there a way to spawn (timed) blast cubes (or any object) at roughly the halfway mark; I have an idea for a game/level that would need a chain reaction to work, but I don't want to make rushing too beneficial so about half way through the game.
Fast travel/tp to teammate for certain classes.
Also a way to set keybinds for the crucible editor would be helpful as I haven't worked it out.
AOE healing can be done with zones and heal options. I don't believe there's a way to only ensure one team gets the heal effect, but you could use team barriers to create a safe area only they can enter and thus heal in.
With the ability to send capture signals, when you capture a point you can have it send a signal to gates. If you box in your control points and use team barriers, you can have it essentially lock one team out of entering the point.
Currently there's not a way to spawn anything mid-match, at least last I checked. One way to work around this is to use gates on a timer that open after a set amount of time, at which point the block you want to be hit becomes accessible.
There isn't really a fast travel, but with knockback manipulation you can technically send any non-guardian class flying across the map at pretty high speeds. Can also use this to make walls that only guardians can walk through.
... I am with you on the keybinds in the editor though. Using ALT for everything keeps causing me to place blocks when I'm trying to just rotate the camera, or pan around the scene.