Totally agree.
I might a bit partial to that, because I tend to underperform multiple choice tests for overthinking, but I've really the impression that open ended questions test knoledge much better and make it more difficult to cheat.
Beside that, having almost nothing to do with cheating, another good thing in the French system is the continuous grading: labs were graded, projects were graded, small intermediate tests were graded, so you really do not study for just the exam (actually often you do not study at all for the exam).
(beware: my experience is limited to a single grande école I attended).
I went to INSA in the early aughts and we didn't really have continuous grading, labs (TPs) were graded but the biggest part of the grades (les partiels - exam week) happened twice a year (or 4 times a year during the first two years of prépa intégré).
I do know that since then they've moved to a continuous grading system. I'm not sure if that's the same with other grande écoles but I do know that my friends in other grand écoles had a similar system of 2-4 partiels a year.
