One thing (not a biggie) i hope they listen to (though Windows Feedback as well as file size is missing now form my install of Windows 10 preview, Version Build 10074) is that of file deletion and copying.
As with recent OS versions of Windows since XP, it takes a long time to calculate 20GB of files and for the first few minutes after it began deletion it estimated it would take over 3 hours to delete them. This is under a 2.8GHZ dual core, with almost 2GB free ram, deleting files from a SATA drive, and with Windows Explorer the only thing using more than 3% of the CPU cycles.
After about 4 min. that estimation changed to 45 minutes and remained there for about 5 min., then changed to 30 min. 8 minutes later that estimation changed to 24 min. 11 minutes more that changed to 21 min. Then it increased to 22 minutes about 3 min later. About 4 minutes later that changed to 5 seconds, where it remained for about 10 minutes, then changed to a finally accurate 4 minutes.
Thus, despite the time taken for calculation, its estimation was fairly useless. while the time taken to delete 20GB of files
I could have right clicked and chosen Unlocker (thank God for freeware, but opt out of any bundled additions) to delete at next boot, but did not.
Copying files also requires calculation of time, resulting in various conflicting estimations of time remaining (7 min. to 23 min. to “more than one day,” etc. for 20GB, ),
But thank God for the many many things that Windows does do well