Is there any chance that you are able to remove the fact that the host has to set the input delay to the person with the highest ping?
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Potentially at some point of future, but generally fancier lag compensation methods are a little out of scope for freeware mods.
Current implementation relies on delay to not have to directly transmit ever-increasing number of enemies (causing issues for players with poor connection in process). I'd probably try to do things differently nowadays.