Part of the problem is that the FIA also mandated simpler suspensions because they weren’t able to police the more complex ones that (some?) teams were using last year (that may have helped prevent the porpoising and bouncing probelms).
As we learned after Baku, there’s a distinction between porpoising (aero induced stalls) and bouncing (ride height induced bottoming out from teams running as low as possible). Teams like Merc may have solved porpoising on smooth asphalt like Barcelona, but they still don’t have a performant answer for bumpy street tracks. Sky also mentioned some driver complaints I hadn’t heard before. Magnussen supposedly had arm numbness, Gasly was asking anyone in sight for a massage, and Ricciardo said his head felt like a basketball being dribbled low to the ground (I hope “shooken” is Australian for shaken). The weight of the helmet may exacerbate the problem, as I don’t think the HANS prevents vertical motion (and even then the 6-10 vertical Gs would just transfer to the rest of the spine rather than the neck). Not to mention at one point during the race Hamilton said his seat went cold and that turned out to be his back going numb.
There’s a lot more going on with aero than I fully understand, like cars having an inherent center of aero that dictates how much front/rear wing you can add without pushing too far into over/understeer. Red Bull’s high rake philosophy was interesting in that at high speed the center of pressure would move rearward as the back of the car squatted, yielding more benign understeer. Under braking, the center of pressure would move forward, yielding oversteer. That changing balance may have been what caught Gasly and Albon out. Or maybe the car was just too oversteery, which Verstappen seems to prefer. Either way, that seems to have been tuned out of the RB the last two years, which may explain Perez’s seemingly greater success (alongside a way better power train).