Those cameras are looking pretty good. They look a bit looser, and more abbreviated. They also look better because the design elements go together better. Seems like your sense of design language is improving, which makes sketching much easier!
I recommend using pens at this point instead of pencil. Pencil is more forgiving, so it’s not as good as pens for practicing. A sharpie will make you good at line weights really fast, and help teach restraint. I’m more of a scratchy sketcher as well. I use the BIC Crystal pens, which are probably too scratchy for good sketch practice, but I like that pencil grip. =)
Pens also allow you to define an idea faster, so you can generate more iterations, and more ideas as a result.