I'm quite intrigued by this paradigm shifter playstyle you've brought up on multiple occasions throughout the forum. I would love to see rosalinas pick up a new playstyle that would allow her to reach new heights in power. However, with no examples of how to play as a paradigm shifter, its all a theory with no substance. Again, I am not against a change in the meta. I just would rather have an idea what I am reaching for rather than guessing what to do based off of what some random person on smash boards says. Please provide examples so that people can understand what you mean.
The word "paradigm" literally just means "the resulting formation from when multiple people combine the same or different roles".
A character like Mario for example, is very versatile and would be considered an all-rounder of sorts. A Mario player doesn't and shouldn't play just offensively, defensively, etc, all of the time, because he is designed to change his role in the match according to the situation. But Mario is only one character - he can only really cover one playstyle at a time.
Then you have Shulk, who can literally change his stats to change his role. But each Monado Art has one specific role in mind (Shield is defense, Speed is rushdown offense and bait and punish, etc). Shulk can't really cover two roles at once either.
Rosalina is the same thing, split across two characters. Instead of just one character using one role at a given time, you have two characters that can cover two roles at the same time, so you could have Luma being used as bait and Rosalina being put on offense or vice versa (yes, there is worth in sometimes using Rosalina as bait, with Luma punishing), or can cover the same role at the same time to have, say, an impenetrable wall of defense, or to dish out tons of damage with joint attacks.
However, sticking to one paradigm at all times (in the case of most Rosalina players, a totally defensive one for both Rosalina & Luma) limits your possibilities, makes you more predictable and easier to read (especially when every other Rosalina player plays just like you), and makes certain characters more trouble than they need to be.
I don't have a specific example to give right now, but I shouldn't need one, as
this is Rosalina's gimmick. This is Rosalina's Monado Arts (saying you need a video example to see why a paradigm shifting playstyle for Rosalina is best, is the equivalent to saying "prove with a video example why Shield Monado Art should be used when Shulk is at high percents, Speed should be used when I want to close in or get away quickly or perform long horizontal combos", etc). People describe Rosalina as a "puppet fighter", but that only describes her aesthetically. Puppet fighters, mechanically, are paradigm shifters. The puppet and puppeteer are two entities, and thus, can assume the same role at the same time, or different ones at the same time, in accordance with the situation.
It's literally just common sense.