Godot

A boring alternative interface would be nice. Properly Windows 95 fare: element hierarchy made crystal clear with relief-shaded borders, fat margins on any nested elements, labeled-by-default icons, "multiple document interface" instead of modes or tabs. Look. Blender's a lost cause. 3D software is universally going to be inscrutable, because you're decorating a room through the keyhole. But sometimes this software has a learning curve like the white cliffs of Dover, and even after learning the right answer, I cannot imagine why that's the right answer.

This is unlikely to happen mostly because the worst decision software can make is two decisions. Established users don't want to deal with the ambiguity of having two non-overlapping ways to do everything. Developers sure as heck don't want to do everything twice just to make it-- not even simpler or easier, but more "discoverable."

What's more plausible is recapturing how Flash worked on the web. Some one-line / one-file way to drop in a whole-ass game. Even if that means cramming every asset into the same bulging JS file. One that looks for an appropriate rectangle of Canvas to emit graphics, and if it doesn't find one, offers to create one anyway.

I guess the hard part in that case is trying to prevent what Flash on the web did for advertisers. A lot of neat browser features are effectively impossible because of an arms race by greedy idiots.