Such as?
Can't say I've come across any yet although tbh I haven't used it much so far.
Out of interest do you also use the keyboard? So far that's all I've used and haven't even tried it in tablet mode yet.
I've already downgraded back to 8.1.. I just couldn't live with it, trust me it's terrible in tablet mode. I do have the Surface keyboard but rarely use it. In pleasing the desktop crowd they have totally ruined the touch experience. Maybe in a few months they will have fixed the issues but I used to fly through doing things and now it's just frustrating.
A few examples,
You can't slide control the brightness in tablet mode.
You can't run Edge browser in full screen.
You can't get rid of the taskbar.
They have moved many of the controls to the left (like the charm bar) which is stupid if your right handed.
Tablet mode forces all desktop apps to run maximised and there is no way of actually seeing the desktop.
At 100% screen scaling everything is ridiculously small, at 150% or 175% everything is blurry and the worst thing is modern UI no longer scales independently.
They have made it so you can only have two tiles wide in each section instead of 3 there is a ton of wasted space in the start screen view.
The stock apps have been ruined, now things like the News app take you to a webpage instead of having the article appear in app.
When you swipe in from the left instead of listing the apps in the line it shows huge thumbnails which just takes longer to close.
Explorer.exe has crashed multiple times especially in the settings menu.
The keyboard sometimes doesn't pop up.
Taping on things doesn't always register.
Automatic updates are annoying.
There was absolutely nothing wrong with the modern UI in Windows 8 IF you only used touch.