I have used the Meade 14" f/8 OTA heavily for two years now and I am here to tell you it is a wonderful instrument. The focuser system is excellent and works 100% as advertised. Unlike other SCT's you will not need to "replace" the focuser at purchase. Now a nice add on is a remote focuser and/or auto-focuser, but you can definitely get by with the focuser that comes with the OTA.
And yes, the image is steady as the telescope is "waved around the sky".
Not sure what "other" SCTs you're referring to but my C11 has a nice large rubber focuser that makes it easy to get precise focus and then a quick twist of the mirror lock screw and the mirror also stays where it is told. I didn't feel the need to replace the focuser at purchase either
Several folks have written on CN about needing to purchase an aftermarket focuser to replace their Celestron SCT stock focuser due to image shift focusing issues, not as much precise focusing. You may have not replaced your focuser, but it has been a common theme discussed on the CN board.
Celestron claims an image shift in focusing for the Edge telescopes up to 30 arc seconds. The tolerances are larger for non-Edge OTAs.
So your claim is the image does not shift when focusing on the Celestron SCT?
Yes, Mirror flop (this is different than image shift) is removed by locking two screws on the Celestron. The Meade 14" f/8 ACF requires only one locking screw. The 10" and 12" f/8 ACFs do not require locking screws.