I Think it would be a very useful setting to be able to change how many items the hoppers transfer at once back to the original vanilla 1 item every 8 ticks. A lot of redstone contraptions such as casinos from tutorials don't work due to them relying on how hoppers would normally move items. i'm not sure what the reason for it being changed in the first place is but I doubt it would effect anything from having this as a toggleable option much how the chest ui's work
Pretty sure it's related to lagg, I'm not knowledgeable on the topic but I've been told hoppers are one of the major lagg causer in servers. I would love this too, but if this worsens lagg even more it's a hard pass for me.
possibly but that is why there are redstone limits on islands, having them set to 8 ticks per item would just mean you wouldn’t be able to have as many in one place without hitting the limit