Dell offers downloadable recovery media and with Windows 10 you can always just download from MS directly too. Never found a reason to keep those OEM recovery partitions on my personal machines.
And just to be clear, you're talking about moving the OEM recovery to the end of the drive? Not the OS one that's the boot partition? I had issues with the OS boot partition being at the end of the drive and preventing Windows 7 to 10 upgrades, so I wouldn't be surprised if it prevents you from doing feature upgrades in Win10 too. Just something to be mindful of...
I stand to be corrected, but I don't believe that's an actual replacement image... I think it just directs you to the most recent ISO for the MS USB tool, and doesn't even include unique drivers.
I'd have been much more comfortable if they'd have had the type of "backup your factory OS" tool that used to ship with all pre-builts.