I already put this in another thread, so I'll just repost what I had already suggested
Koncept- Change lunchbox items (any consumable/drinkable item) to only be used once. The item can then only be restored by touching a resupply cabinet, similar to how the razorback works. Will work similarly with sandman and wrap assassin given that the player does not retrieve their ball. Also applies to jarate, mad milk, and cleaver
This won't make the items immediately good for league play, but it will surely be a step from where it is today, as some items are incredibly dumb and probably shouldn't have been added in terms of competitive play. But knowing that before valve was balancing the game towards pubs, silly unlocks like these were actually acceptable.
I also personally believe that weapon rebalancing should be done in coordination with the competitive community, as having things like the sandman in its current form cost a team a win on LAN need to be rebalanced so it's actually an all around fair weapon. How and if it will be achieved: I may never know. But those are just my thoughts.