I have an idea that will help decrease the lag on the servers. Add the server mod Clear Lag. What Clear Lag does is every 5 minutes, all the dropped items, that never got picked up, get deleted and never seen again. It might be a pain to players if they accidently dropped something useful and it gets deleted, but Clear Lag gives warnings starting at 30 seconds until it does its job. This server mod really helps with decreasing lag.