I don’t know if you pissed in anyone’s cheerios. Hair splitting has always been a customary part of what makes PF PF. Split away…
Whether or not it's a valuable use of time/brainpower is another matter entirely though.
IMO, the difference between a speed reload and your #3 load seems small enough that I’m not sure it deserves a different name. And yeah, I get that your pistol might be a single shot for a skosh less time, but I still don’t think the distinction is worth the squeeze.
Re pure time of the technique, part of what makes a speed reload efficient is that multiple things are occurring at once; you’re gaining the new mag with your support hand at the same you’re pressing the mag release and allowing the old mag to fall free from the pistol. In your suggested technique (#3), these things will be occurring separately and there
will be an associated overall time penalty for that, all else being equal.
Regarding the topic of whether any of the above should serve to do away with reload-with-retention/tac loading skills, I’d agree with others and say NOT.