What, exactly, are you still confused about? If you can tell us that, perhaps Josephine can clarify things for you, although I think the article was pretty clear.
Yes, you had a MIS approach and you're doing well. Your surgeon seems to have explained it well and he's obviously done a good job. As he said, MIS is not suitable for everyone.
As I said before, most surgeons do not cut the quads - that is a method that is going out of fashion because it does slow down initial recovery. Most people do not have their quads cut, even if they don't have MIS surgery, and many of them are now going home the day after surgery.
I did not have MIS surgery. In fact, my right knee that had a revision from a PKR to a TKR has a scar that is 10 inches long. Even with the need to remove the old implant, I did not have my quads cut. My left knee scar is a bit shorter, 7 inches. Again, no quads cut.
I have Stryker Triathlon implants in both my knees and I'm very happy with them. I think you said you had Stryker Triathlons too, didn't you?