I'm not a typeface designer, just a user, so take my comments for what they're worth. The first thing I noticed was the 'missing' serifs on the X. It looks wrong to me.
X/x has a "backwards" look because that kind of shape is more commonly found in the downstroke (relating to cursive form). The awkwardness would disappear if you applied it to both strokes. Something similar at the start of v/w/y may or may not be helpful.
Tail of /Q/ and hood of /f/ are too timid.
The stencil-like breaking at the branching points is probably one too many ideas for this typeface. If you're going to keep that, better to make the break at the bottom than the top of /p/.
thank you for your corrections.
I think you are right with Q and, f and the breaking point could be better at the bottom of the p. Maybe it is one idea too much, maybe not, I´m not sure …