Marked 'Very Important' because the game is literally unplayable. 

The lag in realms with only 1 player signed in has gone from bad (periodically blocks wont break, things stop moving, then catch up), to unplayable-- animations not playing at all, entities jitter around instead of walk. 

No-one can get anything done on our realm-- a PAID FOR service, and I can't seem to get any support or help, either. 

It isn't our internet, let us make that abundantly clear. Several different people with varying levels of excellent down/up speeds all get the same result across several gaming rigs. It isn't my computer. I have a brand new MSI that came out just this year, and it does not come near touching my specs. 

It is only Minecraft that does this-- online AND offline-- but it's worst on realms, utterly unplayable. I tried to search for this issue here and all I got was topics from 2015 which was unhelpful though I am aware that at least part of the lag is likely due to the autosave function, and now seeing that it is possibly tied to multiplayer being enabled?

Unfortunately disabling that just isn't an option. What I want out of this game most of all is a realm that I can share with my friends and family, so I very much hope that this is being worked on in some capacity.