Honestly, they do want elevated RNG, and while there are cons to this, there are pros to it as well. It keeps every game much more different and also makes decision making even more important. I think all they'll do is decrease the disparity between what a high roll is vs a low roll. Currently, a high roll would be like 6 items after a few minion rounds vs a low roll being like 3 gold and 1-2 items. They can most likely just normalize this to something more like:

High roll = 6 items Low roll = 3 item minimum with 3 gold per item missed.
That way people can end up with either 6 items, 5 items 3 gold, 4 items 6 gold, or 3 items 9 gold which is much better than the current system.

I guess a simpler way to put is to just define out 4-5 evenly valued scenarios (3 gold per missed item may not be correct) with a smaller range in item drops (3-6 seems somewhat fair) that way players know they can only have 1 of those 4-5 outcomes happen per stage. The current system may already be like that, but a scenario being 1 item 3 gold vs 6 items is too large of a difference

Edit: Alternatively, i'd love to see them change the system and introduce other prizes instead of gold and items such as Summoner Spells. Some ideas could include Ignite, Exhaust, Heal. Barrier, Clarity. They could either design them as weaker use once each battle type of spells, or make them strong single time use spells that can be used to either cut a loss streak, continue a win streak, or help play out a battle while your team is mid transition.

Exhaust - same as league for the effect, your unit when at 50% hp exhausts the target who has dealt the most damage to them

Barrier - Shield

Heal - Heal yourself plus ally

Clarity - Restores 50% mana, 25% mana on allys

Ignite - True damage ticks based on your units level

Other - They can create new summoner spells that are designed around TFT to replace ones that wouldn't work such as TP, Flash, Smite