Transplant shock... don't stress; it should be fine.

surely this is a deficiency of some sorts?

Nope, just transplant shock. Leaves like that will fall; for when the entire center rib is yellow, the plant has taken back all it can and a mere touch will take off the leaf.

Update: its lost alot of leaves, about a third of its total leaves. Should not have bare rooted it and I regret it :(. I have alot of fruitlet on the tree right now and its in its third bloom of the summer. Should I pluck most of the fruitlet and flowers to encourage growth?

Just ordered foliage pro too. Will this help?

pick off the fruits; but leave the flowers; if you cut the flowers the tree will just make more; and it needs that energy for growth.

Depending on the type of medium the tree is growing in, bare rooting a tree has the possibility of doing a lot of damage to the tree's root system.

The last photo looks like an old leaf that is about to drop. Perfectly normal.

Same thing happened to my ponderosa when I bare root transplanted it. It took a while for it to recover but it did.