Agreed. We debated that a few weeks ago before the ledgerstone was installed. I had originally wanted it to diagonal out, but others had indicated water was more likely to follow the diagonal and possibly out of the pool. PB has definitely said that we won't really know how the water will flow until we fill . Luckily as you have said, this will be an easier fix above the waterline if it is a problem.I really like the tile! Beautiful. I'm hoping that the tile setback on the sides of the vertical portion is enough to keep the water from wicking onto the stone. Water tends to spread out as it runs down. It doesn't really go straight down. I could have seen the tile going back to the pool coping on both sides. I'm no expert in this area but it's something I've seen happen on builds. I'd be very curious to see how it looks once the spa is overflowing. However, it's an easy fix even if it happens after the pool is full since it's all above the waterline and on the sides.