WebRTC has some nice features, such as audio video connections.
Would be great if it gets implemented.
Actions such as open/close own video or audio channel, open/close connected users audio or video stream.
These actions will likely add to the popularity of making apps with Construct.
There appears to be WebRTC support on apple products for the audio video too, would be great if the multiplayer object could work on ios and osx as well.
Making the multiplayer object compatible will very likely make the plugin more popular and will definitely add commercial value.
On the host side, the synced objects can have a variety of important variables set which are not continuously synced. (traffic reduction)
When the object gets (re)created on the peer side; it would be nice if the synced object gets all the current variable values from the host.
This will make any system where the players variables determine some state a lot easier to maintain.
Perhaps directly after creation, retrieve variable values from host for said object.
A solution such as this is in line with the scenario where the host determines states and could aid in simplifying development.