I think the MK IV design was a big step forward in the evolution of the little semi-auto that started the company. The MKI version, some folks wanted 10 rounds, a locking bolt, and to not have the safety off when disassembling things.
Along came the MKII design,,, which many of us felt was "perfect" by addressing those issues. But,, many casual folks still didn't like the disassembly & re-assembly "issues" because they were not mechanically inclined & wanted a simpler & easier way to take their gun apart for cleaning.
Along came the MK III thanks to lawyers, (Loaded chamber indicator & mag safety) but it also changed the mag release design for all models,,, but sadly,, the disassembly & re-assembly got a little trickier for the average guy.
And by this time we also have the frame re-design to have the 22/45 OR the original Luger angle to accommodate different folks tastes.
So, now,,, along comes the fix to the biggest complaint many average folks have had,,, the disassembly & re-assembly issues,,, for the MANY non-gun aficionados who cursed the gun or bought other guns instead of the Ruger.
The MK IV is just another model of the evolution of one of the best little semi-auto 22 pistols you could ask for.
I own Standards, MK I's, MK II's, MK III's, & have plans to add a few MK IV's as well. The only reason I don't already have any is I've been chasing "others" & haven't gotten around to getting any yet. As an instructor,,, I use my Rugers in class. I need to get some to be able to show the current model that the students will find in gun shops.
So,, is this a step in the wrong direction by Ruger,,, IF,,, IF,,, they sell the rights to part of the design? I doubt it. Ruger folks are smart enough to not sell one of the major items that sells a lot of units,, and helps keep them in business. And I know more & more average folks will buy the MK IV as it's the latest design & is quite nice!