The tiles are very small, and most of them don't show any information. I now have to click through several items to get to the same information I used to be able to see all at once on the main dashboard. Please don't remove the Classic look!
I got the option to switch to Modern over the weekend and it did, despite of all the negative comments. And all-in-all, I really don't think it is all that bad. Yes, I do believe improvements can be made, but at least I now have the possibility to configure my dashboard with the information that I find relevant. All components from the old dashboard are available and more. Personally I like the fresher design over the really out-dated design of the classic version.