Strange. I've gotten a much different impression from the series thus far. Aside from Ash being dumbed down and TR losing their original charm, I've found Best Wishes to be a great season. Iris has had several good character development episodes, Cilan continues to be an enjoyable goofball, and the plot isn't lagging. The fillers are either on par or higher quality than fillers from previous seasons, Ash has already caught more than six Pokemon
and actively rotates them, many side characters have been reoccurring, and all three of the main characters have at least one rival. We've also had a few smaller sub-plots (the battle tournament for example) that have turned out to be quite good.
Personally, unless things drastically change between now and the end of the Unova league, I'd rank Best Wishes as my second favourite region saga after Sinnoh. Kanto has nostalgic charm and some deeply heartfelt moments but that's about it, Johto drags for the first 40 episodes (give or take), and Hoenn becomes very boring deeper into the saga.
I'm still waiting for my classic heartfelt TR episode that might never happen, and I'm also wondering where the hell Team Plasma is, but other than that... yeah. It's all good with me. I'd say we're on track for another spin-off season which is always a good thing. The Orange Islands and Battle Frontier sagas (that is, Battle Frontier in Japanese) were both excellent and I'm definitely not against us having another season like those.
tl;dr, my opinion is 100% biased because of Oshawott and I could watch this series simply for him. No lies.