Mixed bag
I would have to say that moving better should be the main focus of your game. In your videos (I'm going to ignore warm up jons
) I noticed you missed a lot of wavelands and dashes, air dodging instead of doing what you meant to. You also need to fast fall stuff more (not just in shffls). One of the hard parts about playing doc is that you're very floaty and thus can be easily gimped by sheiks and marths, so you need to get any speed boost you can.
Shifting gears and risking blasphemy, I actually think you need to pill less. There were opportunities where you could have followed up combos or started a vital chain grab but instead pilled and broke your momentum. If you don't want to pill less, then maybe pill at more opportune moments.
I'm not going to say anything about edgegaurding/punishing because it's already been covered. Follow the advice of previous posts. I'd also suggest more chain grabbing. The ability to chain grab levels out the doc-sheik match up a bit.
Here's what I liked: you had good bairs and you were smart with jabs and fsmashes. I really liked this part in your first video where you held sheik in place with a pill, landed, jabbed for stun, and spaced a nice fsmash for the kill. That was cool. You also had some pretty decent mind games with a short hop, wave land back, move in for the fair type of thing. Smart stuff, but don't become predictable.
You seem to be a good but developing doc, and while some stuff needed work, a lot of stuff was pretty solid. Gj.
Edit: You know, I think I will give credibility to those warm up jons. I was basing a lot of my advice on your first 3 videos, but after watching your later vid, you genuinely got better the longer you played and made less mistakes. My bad.