Is there a plans on TOX support?
As I now, there is now an ability to use TOX through pidgin.
I suggest you contact the Tox guys. Pidgin is modular so if you can find a Tox plugin for Pidgin it can simply be added and used. You could report a bug to post a request for feature.
Provide an answer of your own, or ask Alexander Borisov for more information if necessary.