so what is a professional game dev software?? my take would be something reliable and you can just focus on game developing and not worrying the effort you put into developing may not work at the end, or your game have to wait for technology to catch up, it should just work!
when you look at those 'professional' dev program, they all offer such reliability, even if theres bug come up from time to time, you have the confidence that it will be fixed soon that you can just keep working on what you do.
my experience with C2 is lacking that reliability, its not C2's fault, but its the approach they choose to take, which is rely on third party exporter, you never know when those third party would stop working for you, and when it'll be fixed or ever, because its out of C2's control.
during & after my first game dev, i constantly searching for a more reliable tool for my 2nd game, i stuck with C2 because the ease of use, and my lack of programming knowledge. but with serious game dev team, they must have a programmer, so they don't need to take the risk of working on C2.
a good example of similar software, i dont like to name competitors, ashly should know an osx centered 'vegetable' named game tool thats also aimed for non programmers, they have better documentations, their own exporter, knowing everything worked in the software will just work as it should. they grow from ios only slowly to almost every exports C2 supports, their community, quality of game also grows steadily, feature wise C2 is far ahead, but its useless when some features doesnt work on certain platform, it only cause more confusion for developer.
my suggestion for scirra is to grow the team, go back to all your features, make sure they will work on all platforms, and export to all platforms easily.
starting on my 2nd game on C2, still have faith in C2 team, they are so talented, and i hope they will take the right direction for future C2!