ProjectKorra started out with a bunch of people that started on the old TLA plugin. Our FOUNDER worked with Orion and decided to continue the plugin since Orion abandoned it and no longer released versions (he did have his own 1.7 version, but that was only on his own server which died).
he fact that you're saying "TLA" is better, is pretty counter-intuitive as this plugin is what a large majority of the 'TLA population' needed to keep going with bending. If you wanted to stay on good ole Minecraft 1.6 - you could still be running an 'authentic' TLA server, but nobody wants that.
In the end, your argument about Orion's plugin being better is just that -- an argument. If you want your server to be just like Orion's plugin, you can EASILY change your config to have the same 9 moves per element along with the damages that he had.