I'm assuming that you replaced all the grays? The rest of the scan looks shitty however, all the speedlines have been killed, the only way to fix them is to redraw them all by hand.
Don't overlevel as well, to compenstate for having to do less manual work on the whites and blacks, it's better to underlevel slightly, and then do the manual work. There's no easy way out in cleaning, unfortunately.
Overall, about a MQ.