No need to be update playtomic plugin because it works ! (ok not really simple to use) ... sure it don't provide all playtomic features but leaderboard management is enough for me.
The plugin is not slow, playtomic servers are a quite long to registered scores (several minutes) but no need waiting ! ... put actual player score in the list display on screen testing scores and this problem is no more a problem.
You can also find a example from dysotek in a test version of his C2 game "Super Frenzy Ball" ...
It could be good to have others system like this one for scores but not only ... games use achievements now and this is not managed by playtomic.
Seems there is "tapjs" which can be use for that ... we needed someone doing a C2 plugin using it !