Your sketches are looking great, I think the decision to focus on longer strokes was a good one.
As for your issue with feeling like you were better 10 years ago, I have some theories on that.
We easily romanticize our past, and as we improve we change; your drawings likely look different today than they did back then because you've grown and are a different person now. It's easy to consider your old work better because we tend to have stronger emotions attached to the past. You also probably had a different mindset that allowed you to draw in a different way than you do now. That doesn't make it better, necessarily, just different.