I'm kind of sorry to read so many bad experiences but also of the kind of aggressive tone that is struck when it comes to addressing the Scirra People themselves.
Me, i haven't even finished a proper Game yet, so i'm still learning and exporting to Mobile doesn't interest me too much (PC foreva!!) so of course, it's easy for me to say.
Nevertheless, i kinda had a thought, which probably is too much to tackle for the Guys and i rather have them doing what they do best: making Construct a better Tool but here it is:
How about doing a Crowdfunding campaign to pay a Coder to do C2 optimized Wrappers for all the major Platforms and then make those Open Source so it will be maintained by the Community? This way, no Time is getting taken away from developing C2 and no overhead is created of maintaining it...
Just a thought, i really love C2 and what it does for me and if it just stays a Hobby, so be it. It was still worth every Cent
I know it is probably frustrating for someone longer around than me to never being able to publish his stuff properly on the Platform of Choice but i would never not recommend C2 to anyone because even if you won't make your Blockbuster Game in it it is still a great Way to learn about Game Making and i'm pretty certain as HTML 5 matures more, so will C2.