Perhaps even a mode where some kind of tile system exists.
This will never happen. It would involve rebuilding the game engine to support such a mode and, judging from the very little work they've put into improving the current editor, I doubt they would even consider it.
I just hope Larian realizes that a properly streamlined editor would save them a LOT of money because things could be done INFINITELY faster than they can be done currently.
I'm not sure what you had in mind when you wrote this, but it makes absolutely no sense. How would streamlining the editor save them money? Once they game is bought, that's it. There's no extra cost to them as it is. They've sold a few hundred thousand copies so far, which amounts to somewhere past $5M at $39.99 each at least (not that they get the full amount from each sale). They've got more than enough to fund their next project (DOS was done with just under $1M).
Doing nothing further with this game will save them money. Spending time and manpower improving this game and the toolset would cost them money, not save them money.
There are still game breaking bugs present in the game and there are toolset breaking bugs. Like now, I can't even create a new module without it telling me it couldn't create the module, even though it creates it anyway. Trying to edit that module at all results in the toolset crashing.
The whole thing was great in concept, but when it comes down to it, Larian has thus far failed to deliver the complete package.