I think Takemusu Aiki is the intended result of training with the founder's principles, including awase/musubi. To an extent, at this stage I think TA has similarities with other kokyu-tanren methods at least, in that first you're building a body. That's where my interest comes from regarding the IP/Aiki situation.
Yes, I think Takemusu aiki is what Ueshiba Sensei was doing in his later years. By his training of aiki within himself he could do as he wished with uke whether moving or just standing there. This is what I strive for by conditioning myself...Maybe one day!!! :0)
PS It would seem to me at that level kata/waza/form are not necessary anymore. You just do...