No, just no. First where do you see Obito being engulfed by chakra arm ?
#1th I only see Obito with his hand extended which is engulfed in chakra which creates chain made of chakra.
#2th Where do you seen Obito's legs being intangible ?. Nowhere are shown Obito's legs intangible, because Kishi would focus on that detail and make clouse on this.
Sorry but I see only one picture, and there is nothing you are talking about ;/. Maybe picture doesn't show up to me strange
However stuff you mentioned with Killer Bee I can see it.
However again we don't see close on Obito's feets, not even on his legs so we can't know if his feet were covered by Hachibi's hand.
Besides as I said, not
even entire feet Obito need to walk.
Soles(bottom part of his feet) are
alone enough to make him able to walk, so you ddin't prove anything.
Obito's feet are not showed covered completly by Hachibi's attack. I see that
Hachibi's hand cover Obito's body from knees(maybe top part of feet) to his head, that it.
Show me scan where
Obito's feet(
closure on his feet)
are covered by some attack and then Obito being able to move, I am waiting ...
I don't think that manga can provide your panel like that
EDIT: Sorry, I got what you meant with first picture:
This is one which I posted, yeah ?:
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If yes then only left middle picture shows us Obito moving, with chakra arm covering his body from knees to above. Besides even if Obito's feet would be covered by chakra arm in this picture then only top part of feet, but Obito only need his soles(you know how thin soles are in compare to rest of his body) tangible to move.
Why I don't agree:
#1th You don't have picture showing Obito's feet completly covered by attack only some part of his body while he is moving.
#2th It is just logical that he need at least his soles to be tangible to move, would be stupid, illogical and too farfetched if Obito could move with his feet not exisiting(being in other dimenssion) it would senseless