I think they’re a little different.
The backwards jump seems more like a speedrun “tech” than an intended design decision. My understanding is that you backwards jump because the game only scrolls if you’re facing to the right, so you can back-jump to position yourself without triggering additional enemy spawns. I don’t think the average player would have ever figured that out in the course of normal play.
Stuff like “how do I use DM-invincibility to my advantage” requires a different approach, but it feels way more obvious once you learn about it, to the point where you wonder why you never thought of it. Like, that’s why triggering the move doesn’t incur damage, you only take same when you hit an enemy with it, which wasn’t always the case.
It is amazing how rich a game can be with just like 3 verbs though.