Can you explain what those obvious reasons are?
Because the official multiplayer object from scirra does support UDP.
...
The reason is that only websocket available for Photon communication in browser. Photon servers do not support WebRTC used in Multiplayer plugin.
We are testing websockets currently. For dotnet Photon clients (no browser) there is no noticeable difference between UDP and Websockets under normal connection conditions. But for javascript lib running in browser we always have 100 ms more latency. Need to investigate more.
In any case peer-to-peer used in Multiplayer is always faster than communication via server.
UPDATE: Photon js sdk and C2 plugin show 50-60 ms round trip time in Chrome and IE and slightly higher values in FireFox.
Savvy001
mudmask
Which values do you expect?