Let's start with some ACTUAL improvements.. And these are only the QOL, under the hood impovements:

Stop exposing client IP's in a p2p fashion, you're only enabling crashers to do whatever they please, including DDoS.

On that topic, start fixing all those bugs, memory leaks and what have you that crashers exploit as well. There are literally mods out there whose only purpose is to fix floating point error that would potentially BSOD your PC.