There have been several exhaustion and starvation events under the old rules, so they weren't that great.
Maybe a change of rules will also bring about an attitude change and thus the event rate will reduce because more pilots are being more prudent about their fuel planning/monitoring. Maybe.
Neither you or I can say that it will or won't happen.
So your theory is that there was some causal connection between those events and deficiencies in the rules, which deficiencies have now been rectified?
I’m pretty sure there were already plenty of rules requiring PIC’s not to run out of fuel and plenty of rules requiring PIC’s to have systems knowledge to ensure available fuel was accessed when necessary. I’m not sure how the folks whose ‘attitude’ resulted in them nonetheless flying to exhaustion or starvation will behave differently because of a different set of rules intended to achieve the same outcome.
We’ll see what the stats suggest, in the long term.