It's not necessarilly that people lost interest in your pack. Most people just won't comment on it but still appreciate. I see it with the gliding heat shields mod for example. It's been released practically a year ago, it's the least commented mod of the whole section, nobody talks about it, but it still got 70 downloads over the past 2 weeks. I'm not saying it's the best mod, but my point is that it's more successful than what it looks at first.
Don't discourage yourself, your pack is a reference. It would be sad that you stop it just because people don't show interest in appearance