Yes, I agree, deck 14 just above the pool area has lots of sun loungers. But it is a busy deck, mast bar & grill, & the busy jogging track. Plus, you can clearly hear the entertainment from the pool area.
The former Solstice deck on level 16 was spacious, comfortable & quiet. That area on 2 levels, is now the Retreat, for suite passengers only.
We were on the Silhouette last September, our 6th. Celebrity cruise & I had a sneaky peak at the Retreat. It is very luxurious, but there were many empty loungers, whilst we struggled to find any available on deck 14.