You might be onto something with the idea of "play less frantic". My dad has that style, in that he's fiercely competitive and will go for
everything -- which is great in some ways, but it also means the quality and discipline of his footwork breaks down and he easily picks up strain injuries.
Look to establish a rhythm in your movement. It does depend on the rally, but the general idea is that movement should not be "fast -- fast -- fast...". Efficient movement is more like "split -- FAST -- slow (hit) -- recover -- split -- FAST...". Often as you are moving into / through base (when your opponent is hitting the shuttle), it will be best to slow or even stop your movement so that you can make an effective change of direction (when you see where the shuttle is going).
I will also have a think about other split step videos. That one was mostly a "why do it" video, which means it's a bit "full on". I need more stuff about how to learn it / integrate it into your game.
Yep, late/defensive forehand is on my list too.

I want to cover plenty of details, albeit in a layered approach with the most essential ideas first. There are in fact many details that I've left out of the backhand drop videos, to be covered later.
I know what you mean about it going too floaty. I often had this problem until recently, and I thought my hitting action was to blame -- but it was actually a small flaw in my footwork...
At the moment I have a batch of "footwork to the net" videos to edit; just cleaning the audio as we speak.