I'll bite.
In my opinion, Dada may be the best maternal bullof the old fullbloods. Other good bulls are Iabon, Coca Cola, MVH Revival, MVH Signature, Loulou, Dabla, Iralin, the list goes on. I'm not saying Cunia, Covino III, Epinal and Bysantin were bad. Every sire has their detractions. I have seen tall animals out of Cunia, Covino III was not the best on milk, Epinal could have some big calves and Bysantin, well, he was maternal, but a touch on the coarse or rough side. Iabon could sire coarse animals too.
My justification for the earlier listed sires are the traits of udder structure, mlik, calf size at birth, calving ease at birth, breed back on females, fleshing ability while raising a big calf, how well the calf gets up and sucks when he's born, etc. To me, those are some of the defining factors of what makes a bull maternal.
You know, in the commercial world, it's the pounds that count...but most of all, it's the live pounds that count. Calves lost due to dystocia (sp? DL), cows not breeding back and calves that don't weigh up may be some of the most deciding factors it what define the life expectancy of a cow in the commercial world and if seedstock producers are not passing that on with their genetics, then what's the point?
PS. I hope the BCF son is better than his daddy. I used BCF on 3 cows last year, beautiful calves from a side profile, but junk in regard to performance. I have seriously contemplated throwing the rest of the semen away.