@Akomine I am pretty sure that you heard about the huge amount of lag on the server, and adding a new plugin only makes things worse. Maybe when the lag clears up that we might re-consider adding the mob catcher plugin.
-Swag. B)
If you are concerned about a plugin causing lag, you should ask us rather than assume plugin=lag.
This plugin would be very unlikely to cause perceptible server lag, except if it had significant errors, in which case we'd get rid of it in testing. Also, we won't be adding plugins until we fix the current lag issue anyways, so you don't really need to let that inform your decision too much. Think about the future rather than the immediate present, I'd advise.
Just letting you know, so you can have a more informed decision. Cheers