the old ones are actually easier to fill. The new modern stress for full frays is actually obnoxious. Especially at champ level play. If you didnt throw down 10k or more for the packs, i doubt you have a full set. or even competitive set. Its silly to switch the frays to modern in brawls this fast at set release.

Ideally it would be a 70% wild/30% modern split. Even then the modern may have to have "old modern" lol and include CL and rebellion to ease players into the full set rotation.