Toronto can't step up their offer because they are already doing the best they can; offering an entire team of plugs.
Again, I don't think Brian burke was ever interested in Luongo, probably because of the contract, as we know, he is not a fan of that type of contract. Nonis we know, is really interested in him, but Burke has the final say. Burke has offered us refusable offers in order to look like he is trying to add better players, when in fact he has very little interest. This way, he can protect his own interest, by at least look like he is trying to trade for Luongo. If he does nothing, and everything goes bad next season, he will get thrown under the bus. However if he's made the offers to Gillis, at least the media cannot lash out at him for "not trying" because he can say, he's already tried, to trade for Luongo. Epic fail on his assistant too, for saying they don't want to give up too many assets for Luongo. Fail.
We will gladly hang onto him into the regular season were his value will go up, once teams realize they need goaltending, or once Luongo starts playing real good again, the interest will be there. Burke can go screw himself.