They went the performance route this cycle. On 3nm+ next year they will probably aim more for performance.
I would've liked to see a bit more battery life on the 15 Pro. When traveling it can sometimes be a bit tight if you don't top up. Don't really trust the chargers in airports anymore so need a battery pack in the bag. Fortunately for me I'm switching to the Pro Max to try out the new zoom lens so not a big deal this generation for me personally. I'm sure the 15 Pro Max will be perfect for travel compared to my 14 Pro.