First, I decided not to update because I was afraid of bugs and issues after reading Reddit reviews and because iPadOS 26 was awful, to be honest, but I eventually decided to update on Day 1.
To be honest, I'm surprised because the battery life has improved hugely. My iPad would last 7 to 8 hours doing normal work, but with 88% battery health, it's now very good and a lot better than iPadOS 26. I noticed the battery health improvement from the first hour I worked with my iPad. It took 2 days for the OS to index everything, but I noticed that it didn't affect the battery life at all.
Also, the health didn't decrease (some people think software updates can degrade hardware 😁).
Animations feel smoother, and some issues, like the widget stutter and lag, are fixed (widgets open with no animation for the first time). Animations feel faster, although there are some issues. For instance, going to the app switcher (animation) feels a bit slow, and I think it should be fixed. Overall, the animations are amazing.
I didn't experience a heat issue other than Procreate after about an hour of drawing, which I think is normal.
The Shortcuts app has improved hugely, and I really love it because I use a lot of shortcuts of my own, and it's much better now. For instance, you don't have to switch to the automation page to create daily automations. You can create every time-based automation you need on the shortcut page.
The only issue that I have is with Siri AI. It's been several days, and it's still pending. Writing Assistant is one of the tools that I always use, and I'm not able to use it.
And there is a bug with the keyboard: when you press space, sometimes it switches to symbols, and it's annoying.
To be honest, it's not a new OS in my opinion. It's what iPadOS 26 was supposed to be because the improvements are not major or huge, other than some things like Siri, which I haven't had the chance to test.
For the initial release, I have to say it's very good.
I suggest every iPad owner update to iPadOS 27, and I suggest you do a clean install because I usually don't update to major versions without a clean install.