What if there was an Online plugin which handled a connection to a server (or another client) - which could be made global to all layouts of course - and then a behavior which could be applied to objects which would link with this object and automatically send optimized data, with options for things like dead reckoning?
Edit:
This is in addition to having a full action set for writing all your netcode yourself, for users who want absolute control.
All the facilities that would make online games easier to manage would be totally welcome!
Nowadays single player offline gaming is becoming the exception (!).. if Construct could avoid to the user a good part of the "dirty work", that would make it the DEFINITIVE game making tool.