Just curious, what do you not like about Sierra?
First of all, there seems to be absolutely nothing new that is actually useful (for me at least - maybe the new tabs feature, but I dont miss that actually). And at least for me it does not seem as stable / reliable as 10.11.6. Well, based on my experience, at least since Yosemite no macOS is really stable until a 1x.x.5+ revision, so maybe I also was too early to migrate. Since I run a production machine, I do not update to any x.x.0 Version anymore, waaaay to risky.
For example, there are even more graphical glitches with NVIDIA web driver, but also 3rd party Issues, like my parallels macOS VMs not functioning properly anymore. Yeah, you could blame parallels for that (but not sure whose fault it is), but I don't feel like buying a new version each and every year. And with 10.11 it "just works". And those graphical glitches I mentioned are there even when using the native NVIDIA driver on a real mac! For example, do some fast user switching on a machine with NVIDIA graphics and you will see what I mean. So also on my "real" MacBook Pro, fast user switching basically means I have to restart my machine after that.
What features did they remove?
One point is the console app. At least _my_ most common two usecases were 1) inspecting boot log, and 2) opening console.app after some glitch / issue, to see what just happened. Both not possible anymore, at least not without using some rather crude workarounds (without using the console at all). Console has become also useless, because it basically spams me to death with irrelevant stuff, and I had to make some extensive filtering to tame the output a bit. I mean it could have been much better. Feels a bit like what they did with the DU app in El Capitan, i.e. looks more pretty but is also much more useless. And yeah, the old DU still works in El Cap with a patch, but apparently not anymore in Sierra.
I had also problems with some 3rd Party PDF app, and another thing is that - at least with Web Driver - some Apple apps totally ceased to work, namely Instruments, iBooks and iBooks Author. And since I have an actual job that involves producing such iBooks, that was the final dealbreaker for me.
But ultimately, my problem with macOS and Apple in general is not really so much a specific version, i.e. Sierra. It's more like they neglect macs (especially for "pro" folks who need to earn money with the platform) in general in favor to all that iOS stuff, and that Apple QA has gotten way worse in recent years. Anyone remember Snow Leopard? Well, that was quality software in my eyes. Absolutely rock solid and reliable! Not any more ... If only the alternatives I have would not be even more worse (I hate Windows) or downright unusable (all Linux).
At the current point, there's no ARM chip that can compete with any Intel Core i3 chip, mobile or desktop (which Apple don't even use), except maybe in term of power consumption (with corresponding productivity of course) , what about i5 or i7...
Poor Steve Jobs is probably already started turning in his grave...
Yeah, at the current point! But this gap is narrowing more and more, so I am not so sure that we don't see this special configuration in other Macs as well, or even ARM only Macs (but this may take longer of course). Guess we will have to wait and see.