Recently, Creative has been crashing A LOT and I have some suggestions to fix it. First, the clearlagg interval is a long time. I always see items on the ground. Maybe shortening the clearlagg interval would help get rid of some lagg. Second, because of this lag, chat spam isn't being stopped by your cleanchat plugin. This allows spam which makes even more lag. Maybe try out a different cleanchat plugin. I think this last one is probably the biggest one, TPA's. I think TPAing is a big issue cause whenever someone TPA's then it makes the server instantly load that chunk. Now you might know, there is a lot of TPAing going on in creative. This makes the server constantly load and unload chunks! A solution would to limit amount of TPA's in 1 or 5 minutes. This means once you TPA, you would have to wait a couple minutes before doing it again. Hope these suggestions help your creative issues!! ;)
I'm hoping to become a mod on creative so I thought I might as well give a tip on how to fix the lag!