Grown-up!Ahsoka made me squee a little. So did Qui-Gon's appearance. I think Obi-Wan has much to muse over now, and I don't see him just chalking up Qui-Gon's appearance as a dream or a hallucination. I don't think it borks canon however, because Obi-Wan will probably think the planet itself allowed Qui-Gon to manifest, and that is why he can be delighted to find him outside its confines.
And then there's Anakin. He's such a practical man, isn't he? His mom appears, he calls it black arts, he says the Chosen One prophecy is a myth...Anakin just likes things that he can hold in his hand. He still wants to physically fix, from his mom to his wife, to his master and the galaxy at large.
I've seen some reactions that if Anakin had just stayed, the Force would have been balanced...I dunno about that. If the Force didn't need some physical, hands-on TLC, why manifest in him as a human at all?