Maybe for most Construct users, using C3 locally is not an issue. However when you are like myself and regularly on the move it is nice when you can open C3 on every computer with internet with your account.
The mobile thing is definitely a big plus that it has! I really like the idea of tinkering with the event sheet anywhere I am - on my tablet or on my phone even!
But it is also something that a lot of people seem to be afraid of, because they assume that because lives on the cloud ,it will stop working for them when the service is discontinued or offline somehow .
That is partly due to the subscription licensing model as well, but it is what it is.
First impressions might be wrong. There is a lot to love about the engine. It is definitely evolving in the right direction if the focust is html5. Making the actual editor html5 makes a lot of sense to me.
I'd say that Tom and Ashley made the right call on that.
It will give the engine some web related and collaboration advantages that native editor engines can not do as easily and well.
Real time collaboration for example is a very possible thing already:
http://superpowers-html5.com/index.en.html
I am eager to see if scirra tries to do that with construct at some point too.
Being html5 doesnt mean that it must be a subscription based service that is hosted on some scirra server that people HAVE to rent out. I think it is just a licensing/marketing approach that scirra wants to try out
Superpowers for example can be hosted from a local machine and accessed via a web browser by other machines via localhost - the same way that construct2 creates a localhost to playtest a game, construct3 could create a localhost of itself that other users on the network could access to collaborate on a project!
THAT would make it kick some serious butt on gamejams and literaly give it superpowers <img src="{SMILIES_PATH}/icon_mrgreen.gif" alt=":mrgreen:" title="Mr. Green">
But seeing the licensing model that was announced, I am rather skeptical that they would give that freedom to their users. Although - hosting the game editor and engine could be set to a limited number of seats and scirra could sell the number of seats that a licensed user can host. Just throwing out some ideas here