Uhm, no. Boxing is still a much bigger sport world wide and the money, and therefore the talent pool is much better. Any top 20 HW has probably enough athletic ability to make it big in MMA if they'd crosstrain long enough.
Cro Cop is a dangerous dangerous dangerous dangerous guy, if you don't have any stand up skills you wll get exposed and probablly brutally Ko'd, the loss to Gonzaga was one of those things that can happen to anyone in a sport like MMA, it makes do difference to how i see him as a fighter, if anything i respect him more than i did before.