If it ever gets serious, you can always ask staff to reboot the server. For me, though, it's not been too much of a problem unless I'm on parkour maps with redstone involved (e.g timed trapdoor jumps like on WhompsFortress)
creative lag has been unreal for a while, parkour has also been bad but i guess we just have to deal with it
it's been happening for months and if nobody's done anything about it by now, i don't think they will for a long time
I don't know about everyone else and whether its locational but I've been getting mini lag spikes that send me back to the hub 4-5 times a day more when I'm in laggy areas in a farm but even just walking around.