I rarely use control center. The recent apps list I use all the time. So, naturally, Apple changed that.
Have to double-click the crown now to get the recent app list...and wear out that button, you know, so you have to buy a new watch.
FU Apple!
Interestingly I completely agree that I do not like the change they have made to the side button in watchOS 10.
Whereas you're not a user of control panel,I use it all the time, but I preferred being able to just swipe up from the bottom of the watch screen to access it.
I also used the side button for the previous functionality so for me this is a downgrade.
It seems in this case Apple have been able to frustrate both you as a non-regular user of control centre and me as someone who uses it almost every day.
Sadly I did not take part in the beta this year even though I had access to it.
Had I done so, I would definitely have made this point during the programme for the development of watchOS 10.
---
Edit:
Just to give my opinion on the mechanical button aspect.
It's probably an extreme position to talk about wearing it out, but I can see the point that was being made in that if there is a software way of achieving something rather than using a mechanical button then that is potentially better because Mechanical buttons can break – that's a fact.
Now this may not be down to just repeated usage, there can be defects from manufacture on individual products, so if there's a way to avoid using that button through a software interface that minimises whatever (albeit potentially small) risk there may be.