On the contrary, because it was realised that the PESA performance is the main problem for winning exports, the AESA development started. Do you think the PESA could have supported Meteor like Captor M or the ES-05 do today?
RBE 2 AESA was a desperate need for Rafale, but having that technology 1st, doesn't make RBE2 as good or better than other AESAs (remember UAE and APG 81?).
So when others have the same tech, you need to further develop RBE 2, to keep up with the capabilities or even stay ahead. If Captor E for example would be the first radar with EA capability, it would be a major disappointment for Rafale, which was developed with advanced EW and jamming capability from the start! But just as SPECTRA is not special anymore and is partially even surpassed, RBE 2 will suffer the same faith without proper upgrades.