I'd like to be able to set CE values of objects in playfield in editor. With this, the CE value of objects in playfield doesn't always have to be the default on the beginning. It would work like this:
I have CE 1 with anim_mode:ce_value. CE value 0 = green gem, 1 = red gem, 2 = purple gem, 3 = yellow gem. Default CE value is 0. First, I make a rectangle of CE1s in the map. Then, I select a new tool in editor, press one of them, and enter its new CE value ("3"). (I'm not yet sure where to enter it, but that's just implementation details.) When the level starts, the CE will now look like yellow gem instead of green gem.
There's also the question how to indicate special CE value in the editor. I suggest something like this: when the CE uses its default CE value, it looks like normal. When the CE uses a special CE value, it has the value written on it, like this:

Example where it could be used: to make a text message in the game (or "static version of FMV"?) which uses only one CE.