Head, at least, has the TK82S pallets, which are square. For me, they are perfect. So, users have a choice.
No such thing with Volkl. There are rumors of Attiva S, but I have not seen anyone positively confirming that these pallets are square, and it is not clear on which Volkl racquets they fit. The warnings say they are only for the "Attiva" racquets.