help!! skip osaka and add days to tokyo?

here's my itinerary:

4 nights in Tokyo

2 nights is Hakone

4 nights in Kyoto

1 night in Miyajima

2 nights in Osaka

(1 night back in Tokyo but just to fly home in the morning)

should I skip staying in Osaka to add another day to Tokyo and Kyoto and then just visit Osaka as a day trip from Kyoto? I'm not a huge nightlife person but am up for the adventure. I'm young and ready for whatever!

suggestions? advice?