If you refered to the pacifist with axe armor, it does use code and alterate gameplay, so I was under the impression that if gameplay varies, it warrant a different category.
In this specific case tho, it happens to be slower, and that was my main reasoning for it to go playground, because luck code was 1min30 faster, so that seem to stick to the scheme.
But because luck code did not obsolete the old movie, to me it means theres 4 variant of each categories, provided there is gameplay difference in between them.
In pacifist case;
-sram no code will be roughly 20min, still faster than the old and lesser kills, easy decision it just obsolete.
-sram code is the recent run (and axe armor is the playground alternative because slower).
-no sram no code will be like sram no code, with added dialogs, but also no duplicator and no skip death, so it will have to get shield rod to replace ninja stars (I would call that consequent gameplay difference...), and different/slower technique to get mist,lets say roughtly 25min. edit: it will also require to visit caverns, have to add 1 or 2 minutes, and consequently with further alterated gameplay
-no sram code will be similar to no sram no code but will be able to skip death and use big toss in similar glitch of sram code to get mist, it will also have to get shield rod for dracula, roughtly 23min.
Some of my estimate could be off 1 or 2 minutes for dialogs, but the differences in gameplay or time saved by skipping dialogs should be right.
Out of those 4 movies, only no sram no code would be "standart" and the 3 others would be alternative; replay + luck, replay, luck
Edit: as to answer your summary, I would be ok for things going into playground, problem is you would have to move ALL the current runs to playground, since im going to obsolete them at a point or another, as a reminder there is zero of the published that does nosram+nocode (thats how we have no standart category anymore).