just to add my two cents (tho im sure some ppl will ignore me for unspoken reasons)
1) yes the plugin has def increased tickrate and as a result mobspawn has increased as well which can be seen as both positive and negative
2) while the plugin removes items off the ground to help with lag, it also is a pain when working on any structure with semi-valuble blocks. imagine building a house with iron blocks or for that matter any material, you normally leave items on the ground till you are done, then pick them up. here, you need to jump down every few min, and half the time items are disappearing when there was no warning before anyway
3) i spawned in and killed a wither today. i nearly lost the star, and actually did lose two wither skulls due to the plugin
4) many large crafting projects for potions require stacking dozens of potions, the easiest way is to get a vip or someone to stack them but to move them 1 at a time is a pain so you break the chest they are in, and stand in the pile just typing /stack till they are all stacked. the plugin of course just goes and removes them from the ground at the most inconvenient times.
5) auto farms=worthless now. need i say more?
all said and done it is up to the admins to decide if the plugin lasts, but it would have been nice to see a vote for the plugin, and maybe some other options for reducing lag in a less harmful way to players that dont have an endless creative inventory
edit: fixing typos