You mean, leave it the way it has always been? States currently handle daylight savings or not, some even carve out regions that hook up with neighboring cities in a different time zone which they’re economically connected to. Letting states continue to set their own time will be exactly as confusing as it currently is, because it is no change at all.
It’s somewhat silly for the federal government to grab this authority for itself. States are the right level to determine what time adjustments are needed in their precise circumstances. Southern states don’t have the yearly day length issues that northern states do (sunsets that vary by less than an hour between summer and winter really don’t need a clock change).