The analyses of a text #2

The narrator recalls his adolescence.
He visited his old friend Traddles' place for the first time, and there met his old friend Mr. Micawber as Traddles' land lord who had been a debtor quite a while.
And he invited Taddles and the Micawbers to his apartment.
But his landlord Mrs. Crupp spoiled the mutton dish, and so they are cooking the dish again from scratch, according to Mr. Micawber's instructions.

..............................
What with the novelty of this cookery, the excellence of it, the bustle of it, the frequent starting up to look after it, the frequent sitting down to dispose of it as the crisp slices came off the gridiron hot and hot, the being so busy, so flushed with the fire, so amused, and in the midst of such a tempting noise and savour, we reduced the leg of mutton to the bone. My own appetite came back miraculously. I am ashamed to record it, but I really believe I forgot Dora for a little while. I am satisfied that Mr. and Mrs. Micawber could not have enjoyed the feast more, if they had sold a bed to provide it. Traddles laughed as heartily, almost the whole time, as he ate and worked. Indeed we all did, all at once; and I dare say there was never a greater success.
[David Copperfield by Charles Dickens]
1. I'd like to know if "what with" functions through the whole gerund phrases in blue.
2. I'd like to know why the words in gleen are "the"s, not "our"s
3. I'd like to know if the phrases in red are complement of "the being."
4. I'd like to know if "as possible" is implied after "heartily."
5. And I'd like to know if "as he ate and worked" means "while he ate and worked."
Thank you in advance for your help.