Paul,
Was it decandled this past summer? It doesn't look like it.
Once you get it on a regular decandling program, those branches will develop good ramification and the needles will shorten.
It will take a couple of years to really thicken up those pads.
Paul,
Love the bark!
That last pic from the underside is most instructive...
Look at how most of the sub-branches come off the branch at nearly right angles. Like an "L". You know how to fix that, tighten up those angles to "V"s. The tree will look 100 percent better!
I do like this type of pine over the more massive base types. Not that it's not a massive tree, but has a real light feel to it. Really going to be a nice tree, the bark is to die for. Hope it gets back healthy for you quickly after your repot!