Creativitoys and Toy Box features you are hoping for in 3.0

Yeah "sticky" themes would be most helpful

Yeah. Hitting the "Set Theme" on a plant cluster should change the theme for all other clusters.

A copy and paste feature, where you could also select a huge area and theme it without theming the whole box

I posted something earlier about exactly that @ElmoSTM. I also emailed it to support and tweeted JV the idea. Fingers crossed!

You should be able to make missions in the toy box like the ones in the playsets. There should be a mission list in the toy box just like the one in playsets where you can see the missions you have and create new missions for that toy box.

Definitely agree with that @Yorkshire22. Quinnjitsu posted a few days ago that there will be a lot of new toys to help create better cinematically and that the doors are being flung wide open for storytelling. I can't imagine having all that without something as basic as mission givers and waypoint markers. Fingers crossed!

This isn't really a toy but when placing terrain blocks and other toys, I think the vertical movement of one block (referring to the smallest basic block) is too high. When moving horizontally, you can move a half a block but vertically it is a full block. Sometimes that doesn't work when trying to scale things down.

A coupe more Ideas:
1. Movable blocks that could be hooked to other toys when moved. This could be used in dungeon crawlers to move walls and unlock new areas. Like in the original Zelda where you push blocks to open the path the the stairs. Move the block and it could activate a replayer...
2. Springs or Trampolines for platforming. I have used the booby traps and whirlwinds to simulate this in the past but the booby trap requires you to do the mid-air recovery and the whirlwind won't allow you to move your character until you reach the locator.

I think 1. could easily be covered if they would include the physic blocks in the same way as physic balls. As is, they won't affect buttons or trigger areas like the balls can.