I've moved this thread to the Royal Caribbean section. Thank you MCPayne!
A balcony under the cantilevered hot tubs is not going to suffer a significant loss of sunlight. It should be understood that the balconies on the Liberty are not designed for sun exposure, and any sunlight depends on ship position in relation to the Sun.
I had a standard balcony cabin on the Liberty this past December for the Rock Legends cruise and we were on deck 6, and under the hot tub. Our views and our exposure to the Sun were unchanged.