The strats do pale in comparison to battles like Ash vs Katie, Conway, Paul, Cynthia and Leon by a large margin which ig is why its more egregious
Sawyer, Alain and even Kukui had strats in their matchups time to time, but weren't hyperfocused on then specifically like the rest of the battles I mentioned, being more of a spectacle instead and in the case of Sawyer and kukui, narrative payoff
I agree on the Katie + Paul fronts. Haven't watched the Conway battle in years but from what I remember, I'd probably agree with that.
IMO, the strategy in Leon and Cynthia fights are still closer in level to the XY fights (possibly still higher but I'm not going that deep in the comparison).
I think the strategy in Ash vs. Cynthia is very video gamey which is fine, but I generally prefer strategy that involves the kind of creativity that we generally don't think of. Counter shield was nice and the Sirfetch'd shield for Stealth Rocks was alright albeit a bit unrealistic (but so was the Aegislash floating wood lol), but asides from that, most of the strategy is still frontloaded in the battle, and on Cynthia's end. I think the imbalance of strategy being more on Cynthia's end than Ash's end hurts the overall strategy of that battle from my POV. That being said, Ash vs. Alain does have similar issues on the strategy imbalance (where Ash led the strategy while Alain still mostly mashed and won), but I like the creativity aspects that Ash vs. Alain brings.
Ash vs. Leon strategy felt relatively basic compared to the other ones. Outside of Leon's Counter Shield and Dragapult's Dragon Tail strategy, I feel like most of the "strategies" to note were generally bait and punishes, use this move to counter that move, or ideas we've seen before like the Ice Field. We still don't really have a proper explanation on the Dracovish thing either. The one big one that would've been neat to see figured out was Libero, and we know how that ended up -I actually dock points on the strategy front because of how this was handled.
IMO, if I were to rank strictly on strategy (no Conway; scuffed 3 minute ranking; Kukui isn't in this ranking cuz my brain isn't remembering much about that fight at the moment):
Paul >> Katie > Sawyer = Cynthia > Alain >= Leon.
I think the strategy in the Alain front went down in my mind now, but I now think higher about the Sawyer strategy now. That being said, I think Sawyer and Cynthia are still relatively close; Cynthia fight having pretty good game strategy but the strategy distribution being relatively bad, whereas Sawyer fight might've had a bit less strategy but was more creative overall and balanced.