Have you switched to the Scirra multiplayer plugin ? or still using the socket stuff ??
I made several games using varying multiplayer techniques, php, websocket, socket.io, Scirra's web rtc etc
For me I can say the best results have been with Scirra's web rtc.
I even combined a few techniques in some games, but the Scirra multiplayer is the core for player/player interaction.
The only problem with Scirra's multiplayer, is that it's approach is not so obvious and straightforward as other techniques.
You need to work out what will work best for your game mechanic.
Who dares wins