Changing end of itinerary and need advice

Below is my original itinerary. Wondering if on the 7/2 day trip to Hiroshima we should stay overnight and also explore Miyajima island and head to Osaka then next morning.

Depart 6/29 Depart for Kyoto Arrive Kyoto Hotel the Mitsui

6/30 Southern Higashiyama, Downtown and Fushimi-Inari

7/1: Arashiyama, Kinkaku-ji and Daitoku-ji

7/2 Check out of hotel Day trip to Hiroshima with bags forwarded to Osaka with return from Hiroshima to Osaka and arrive evening to St Regis Osaka

7/3: Explore Osaka: osaka bay area and kita district

7/4 Minami District and Tennoji

7/5: Check out of hotel. Day trip to Nara with return to Tokyo in evening. Check in Prince Sakura hotel

7/6: Final day in Tokyo to poke around. No definite plans

Day 15: 7/7: Depart Tokyo 10 am for U