Actually, there is a $2000 rebate on the 2020 Highlander Hybrid in my state. It might be region dependent.Also, Toyota gives no incentives on newly introduced models (the 35mpg Highlander was new for 2020).
My 2020 PacHy has been great, but the Yokohama tires it came with are a bit of a fiasco. I'll replace them soon enough, and lesson learned to get the "wheel and tire group" upgrade next time. I even like the UConnect system (leagues ahead of Toyota's infotainment), which frustrates some folks! I'll never buy a non-hybrid car again, and would love an all-electric minivan or affordable SUV, but that's me.
What's wrong with the Yokohamas? I think they're fine for a van and have low rolling resistance so they won't have as good of grip as non-LRR tires. I too wished I had the S package with the 18" Michelins.