No. Do not tile the planter wall in the current pool and exterior hot tub wall tile. The blue pool tile on the exterior hot tub wall is already bad. Whether you want to add a seating cap to more of the planter wall next to the pool should be decided on if there will actually be a large enough crowd to use it.

You have four hardscape textures happening now; the pool tile, the plain cement, the paver section of patio and the planter and back wall block. You need all these elements to work together for a cohesive design.

So what to do? I'm kind of stuck. Maybe colored stucco on the planter, exterior hot tub and back wall would help tie things together. Let the pool be pool tile, but even that could be redone in a tile that flows better with the stucco.