I have shaved 3 times now with my newly bought Fatip picollo OC and i agree with your findings, very efficient razor and quite mild with shallow angle (the handle more towards 90° from skin, as riding the cap), and quite agressive when used steeply (angle more scratching with the base plate over the skin).I'm sure it's very dependent on the person. However, it's been my experience that the Fatip open comb razors are quite different from most DE razors because their feel is very sensitive to blade angle. They have almost zero blade gap and a lot of blade exposure. If they are used with a shallow blade angle, by riding the cap with the handle almost at 90 degrees from the skin, they don't have a lot of blade feel at all and they can be quite smooth and mild. If they are used at a more typical blade angle, with the handle somewhere around a 45 degree angle relative to the skin, they are very aggressive and have a lot of blade feel. I can get great daily shaves from the Fatip open combs when I focus on keeping a shallow blade angle. Otherwise, they are just too aggressive for me for daily use. And I enjoy fairly aggressive razors during my every day shaves.
I still have to test with different blades though (now i use a now discontinued Gillete Bleu Extra in it on about its 6th shave and it works very well).
One of my most efficient razors together with my Yaqi mellon SLOC and my Razorock 37 german slant.
I think this Fatip is a bit special in the sense that the used technique with it will change the way it shaves/feels in quite large amounts. Mine also has the minor blade alignment issue, but it is possible to manually adjust the blade to get a good alignment.