You know your streams so you would know if there are better and deeper holes for the fish to winter in. I agree that the fish want to be deep, on the Clark Fork River in western Montana, I will nymph with 13 or more feet of leader below my strike indicator since the fish are in the deepest portions of the river, near structure.
I do see a little ledge in that hole so some fish may tuck in against that ledge but if there are deeper holes in the area with some good structure to hide under, that is where the bigger fish will be. They want soft water that carries plenty of food. The big fish have to eat at least 3 times a day during the winter. The little fish can get away with just one feeding, so you stand a better chance of catching a larger trout during the winter months.
I’m surious how much current there is at the bottom of the pool. If there is a calm zone right beneath the current, that could be an ideal feeding spot. Now only does teh current carry food past, but some of those articles might drop down into the calmer water. If there is a strong, Spring thaw, the current might scour the pool and so keep it from silting. That would be the time when there would be fewer fish, I would think.
I also think the lack of trees on the bank would make the trout feel exposed. Little stupid ones will stay in such areas through winter…BUT…an old wise trout sees this hole as a transition area.