Speaking of tile editing I think there is one thing that could come in really handy when editing sprites and tilemaps inside Construct 2.
In the sprite editor, there could be a way to view your sprite as in a tilemap, with a few copies back to back at once.
Some dedicated tile editors out there have this function and it is pretty useful. The thing is that you can view your tilemap live while drawing so you can get the borders/looping right.
I hope this makes sense.