And this is the 2pp from Newspoll just before Turnbull was removed as leader:
Newspoll 27-29 November 2009 Coalition 43...ALP 57
And preferred PM: November 27-29 2009 Rudd 65...Turnbull 14...Uncommitted 21
So, I don't think Turnbull would have done as well as you suggest. You seem very anti-liberal - I can't see you voting for liberal no matter who the leader might be.
It seems Abbott is doing a fantastic job as opposition leader and the polling for the coalition is vastly improved from the Turnbull leadership days.
No wonder lefties want Turnbull back...lol
Source of above newspoll: http://www.newspoll.com.au/image_uploads/091109%20Federal%20Voting%20Intention%20&%20Leaders%20Ratings%20+%20CPRS%20+%20Best%20Leader.pdf