One way to deal with the exporter hell would be to be able to use C2's projects in CC?
No big loss, as CC is EXE only, DX9 is enough for the software's capabilities, unless 3D comes into the game, which I highly doubt.
HTML5 is spanking new, so relax. Remember that computers increase their firepower all the time, tools improve performance with each new release. Give it a year or so for Construct and HTML5 to mature.
I'd prefer that Ash would give us EXE output as well. I'm not yet able to "think" in gaming through browsers, so I visualize my games being played through keyboard/gamepad.
Either way, C2 is still an infant, so let it grow.