Certainly a good improvement. Not only would it make transaction and transaction time predictable, it would also make mining rewards more predictable. It would help bringing transaction fees to a stable point which would be much better to the network. Burning the excess token is a way to tell there's no advantages of going with higher fees. It won't have much impact on the currency itself as it's still unlimited in supply.
Can't wait for this upgrade goes live in the main net, I will start using ETH once again after gas fees stabilize and return to normal level. Getting tired of numerous scams in BSC network due to low fees and low entry barrier in deploying a contract.
You do not need to wait for a new hard fork, it is better to use the Polygon level 2 solution.
Mainnet fees are very cheap right now, but the market situation could change quickly due to high demand.
Until Ethereum 2.0 consists of a sufficient number of shards, then the best way for cheap transactions will be a level 2 solution. This will continue for at least several years.