I think you could combine days 3 & 7. Sentinel Dome, from Glacier POint Road, is a VERY easy hike. And I am still not a big believer in Day 2: WAY too many people to make that fun. Day 5 seems a tough way to follow Half Dome. I would do the Glacier Point and SEntinel Dome that day, as a rest day to recover.
And don't forget that some of this involves some driving. Y Valley to T Meadows is a good 90 minutes, more likely 2 hours with traffic...