I just had an idea for a WECUI replacement. In Minecraft 1.9 particles will barely lag your computer. This is because they aren't seen as entities anymore. We could try to use these particles as a replacement for WECUI. Of course once WECUI is updated for 1.9 it is favorable to use that.
or we could create a separate plugin that would implement this behavior.
or we could create a separate plugin that would implement this behavior.