As someone with a novel currently on submission, I was momentarily heartwarmed by The Little Novel That Could. But then I saw your post from a few days ago - 17 submissions in one week - and a cold chill went down my spine. Any one of the Gang of 17 still alive to tell a tale?
Don't worry about the 17 projects. The number of projects I get in has no relation to the number of projects I acquire. I only acquire things I love; if I don't get anything I love, then I don't buy any projects. If there are a lot of things I love, I bring them all up to Robert the Publisher and buy the ones that pass our board meeting. If 16 of the 17 projects were life-changingly awesome and we all agreed on it, I'd buy them all--honestly. There will be a time of proposal famine in the future and it will balance out the flood.
Also, I never read a project right away (and maybe you think I'm a slacker, but I promise most editors are like this). My fabulous assistant reads them all and gives me reader's reports first. That way I can prioritize the projects that have real promise and I'll have two, not one, reads on the manuscript when I go into ed meeting. (So yeah... incentive to be really, really nice to editorial assistants.)