As already mentioned, you’re taking chances with the trim where you’re bleeding type off the edge. You’ve carefully positioned that type to be slightly cut off and give it a bit of tension, but if the trim is even slightly off in one direction or the other, you’ll have something that looks more like a mistake than intentional.
I get the over-tight leading is done for aesthetic purposes and it works on the headlines, but you’ve done so inconsistently by not doing the same with the leer van de meesters panel, then, for some reason overly tightened the leading on the yellow paragraph just below it.
Speaking of yellow type, it works when surround by the darker magenta-colored background, but doesn’t work on white. You already know that, though, since you used a magenta drop shadow to make up for the lack of contrast, which isn’t an especially effective workaround. In this case, it’s also inconsistent with the typography in the rest of the trifold, which makes the workaround even less good.
I’m not too sure I like the sans-serif type you’ve chosen as a secondary face. It just doesn’t complement the friendly serif face you’ve used all that well.
Despite all that, like others have said, I think it’s nice-looking work. Things do bounce around a bit, though, and I might have made things a little more orderly myself, but that’s just me. I think what you’ve done works.