Try riding it, then comment. I’ve ridden 11-25, 11-27, 12-27, 11-29 and 12-29 on 52/36 and now I’m rocking 11-32.
It’s just as useful around the UK as it is in the mountains, when you’re crawling at the end of a heavy CG back home or upping cadence on a super steep country lane on a 2hr ride. It works. As for extra weight, yeh it’s weight weenies and all but the additional cadence and saved energy and the Watts I can pump out being fresher make a bigger difference than the 40gs or whatever minimal weight I’ve saved sticking to 11spd.
There is no need to go to 12spd until you go to 12spd. I would’ve been happy with 11spd but new bike meant 12spd. For some it works, for you I doubt much will work if you didn’t come up with the idea

All joking aside though it is decent...