Also own a KE, and this is after plenty of tinkering with DIY printers and whatnot. It's a really damn solid printer. Only thing I did with mine is add some threaded rods as frame braces since the gantry is a tad flimsy if you really try pushing the speed up.
Also you can throw klipper on the KE. Creality opened the firmware up for it.
The SE and KE completely eviscerate the sub $300 printer market atm.
*Edit* Oh, I will say. Check the screws that secure the linear rods on the Y axis. One of mine wasn't even touching the rod and it was able to wobble a tad...