Oh, people definitely read these things.
Speaking for myself at least, silence often means you're falling between "I can see this working with a few minor tweaks", "I don't see this idea working under any circumstances", and "I love the base idea but the execution needs radical overhauling" That is to say, "meh" is not typically a constructive comment.
In this case, "meh" is what my honest reaction boils down to. I don't see it not working, but I'm not wowed, either… its "okay". There's a saying in art: "Good is dead". You don't want just "okay" or "good" or even "perfect", you want "interesting". The same idea goes for writing- its better to do an interesting idea competently than it its to do something formulaic flawlessly.
Don't feel like this has to be the end of this one, though; I've sometimes tinkered with image or story ideas for years before anything came of them. Its okay to wait until you get that flash of inspiration at 3 AM that tells you how to take something from "okay" to "interesting" or even just maybe "great". In the meantime there's an infinite world of other ideas out there to explore while this one ripens.