Your comic is only 2 weeks old and you already have 15 subscribers. You might think that's low from seeing instant successes, but that actually a good amount. The first month I ran my comic I only got 3 subscribers. If you start a new story, you are more than likely to just see a similar situation with the only difference is that you're starting from scratch again. Your art is fine, I'd have to take a closer look for the writing, but the problem is that you're expecting too much when you're just starting out, you already have a good start, don't ruin it.