I think that, yes, it will improve things.
Concerning the change in terms of the burden of proof, I would remind you that, under the current system, when a consumer files a complaint, it is up to them to prove that the airline did not apply the regulations properly. The problem is that all the implications of the flight disruption are in the airline's hands. So it's a very difficult situation for consumers, who find themselves in the David and Goliath situation. Not only do they have to fight a giant, but they do not have the tools for the fight.
Reversal of the burden of proof helps rebalance things a little and lighten the burden on consumers.