Whether your novel is publishable is, for you, an imponderable, so my advice is to avoid the occasion of sin and try to put this question out of your mind. You have made your commitment; now make the most of it. You will also try to decide whether it is good. Let me answer that for you--it is, but it can be better, and your job in rewriting is to make it better. "Better" is not a global trait, but a group of specific qualities you can work toward one by one, knowing that they work ecologically--as you make one better, it might get out of balance with the others, but it also might make the others better. Every novel is a system. Sometimes the system looks out of balance, sometimes the system looks in balance but rather shallow, sometimes a small change balances the whole system and everything gets better and deeper.