6 day Croatia Itinerary - Split to Dubrovnik

Hi everyone, my significant other and I are traveling from the US to Croatia in May for a week. We are flying into Split and out of Dubrovnik. No particular travel pet peeves or special focuses we have; we like history, food, nature, relaxation. We aren’t on a really tight budget but not ultra high end travelers either. I am happy to drive a car if needed and can drive manual, but it seems for our trip ferry may make more sense.

Given our limited timeline, we don’t want to squeeze too much in though I know this will be a decent amount to tackle. I was told this itinerary would be doable from people who have been before, it seems consistent with some guides I’ve seen online, and I’ve tried to read through as many Croatia posts in r/travel as I can, but I wanted to ask if anyone had feedback!

Split 2 nights, Hvar 2 nights, Dubrovnik 2 nights

• Sun 5/10 land in Split midday; walk around, tour palace; sleep in Split
• Mon 5/11 Krka day trip? Or just hang out in Split; sleep in Split
• Tue 5/12 morning catamaran to Hvar; hang out in Hvar Town; sleep in Hvar
• Wed 5/13 boat / island tour / biking; sleep in Hvar
• Thu 5/14 morning ferry to Dubrovnik; sleep in Dubrovnik
• Fri 5/15 morning walk the walls; sleep in Dubrovnik
• Sat 5/16 fly out of Dubrovnik 6:30am

Re: Hvar, I know other islands like Korkula sometimes are recommended but I figured shoulder season hopefully means crowds aren’t quite as bad on Hvar, and it was just highly recommended by friends who went recently; but we're flexible! I assume cutting Split down to only one night would be too short particularly with jetlag even though my impression is that we should maybe prioritize other spots. Krka sounds wonderful but I do think it would be a lot to try to squeeze in.