then what's the point of watching him trash the other competitors. Especially with a limited number of episodes, it's better to spend that time to create two quality full battles.
To show his progress so that his entire 8 badge collection quest wasn't just for nothing. (Keep in mind I'm being extreme here to make a point, not fully what I believe)- But why would I spend nearly 3 years of my life watching about Ash collecting 8 badges ONLY for the most important tournament to BE about Ash battling Sawyer and Alain and potentially winning the tournament.
Why would anyone EVER be okay with having spent a long time for ONLY TWO full battles? Episode after episode. Training after training. Team Rocket after team rocket, ONLY culminating in ONLY two full battles?
That is NOT what the league should be about. For Ash to do so well in league required us to see his progress. You're arguments of Ash-Greninja illustrate the problem even further. Ash shouldn't just SWEEP his way to victory. It's Ash Ketchum the underdog. We should see him struggle to justify his potential WIN in the entire league.
Now Ash is potentially going to win the Kalos league just because of a SINGLE powerful Pokemon (and no I'm not undermining Ash's other Pokemon, but Ash-Greninja swept a trainer with Ash-Greninja so in order to get to the TOUGHER battles he uses Greninja to carry his way forward). We spent nearly 20 years watching....(okay the Japanese) spent nearly 20 years hoping for Ash to win a league, and it boils down to "Only 2 battles" and "A powerful Pokemon" and you think that I would ever be okay with this just because the battles in of themselves are full battles and badass?
No. This is Ash Ketchum my favorite character in THIS anime. Probably my favorite character in an animated show (but definitely not my ALL time favorite character) and we don't get to see Ash progress to potential victory. Instead Ash is sweeping to potential victory, solely in a tournament that ONLY deals with 2 very specific rivals, and rivals that weren't written properly either, and with Alain his rivalry with Ash was more rushed than Sawyer suddenly becoming competent.
Alain is like a glorified Tobias, difference, Alain probably if he beats Ash isn't going to sweep him like Tobias did. And Sawyer is like competent Barry or a less creepy more competent Conway, but a very lesser Paul/Gary.
And this is all how you want Ash to potentially win the Kalos league or any league for that matter. Not something Ash earned through struggles and tribulations which trainers should do, but the equivalent of giving him the trophy on a Silver platter, ALMOST to the point of why not just give Ash a winner's trophy and ignore the whole league. The only reason it won't be like that EXACTLY is because of the competency of Sawyer and Alain as trainers. But it's hardly going to be all that impressive if Ash wins.
The battles will be impressive, no doubt. But the wins will not. Not even the basic idea of Ash defeating Alain to win a Pokemon league is that impressive (only in concept/on a piece of paper) since its undermined by how Ash GOT there.
But this is just MY opinion.