This will probably balanced for the release version anyway, but at the moment most pregenerated souvereigns are strongly overbudget. Furthermore we can not rebuild them as theri weapons and parts of their clothes are not available in the souvereign builder.
Example for overprices:
Procipinee: 12 Points overbudget + Weapon for free (Magesstaff, unavailable)
Carrodus: 15 Poins overbudget + Big Swort (Unavailable, this alone would cost 120 points when the current weapon prices stay)
Karavox: 8 points overprices + big sword (again unavailable)
So from this the first thing i get: even you had not enough points to generate meaningful Souvereigns. And Wepons were given for free to all of them.
So please make sure that we have enough things available to build our souvereigns (especially weapons, because those also show in the Picture of the Souvereign, and most poses look silly without a weapon equipped)
And furthermore make sure that the prebuild souvereigns are in line with the custom generated ones.
On a related note: Is there an advantage to being of higher level? If not you should also make sure that all champions have the same number of points attributed to them because otherwise some level 10 heroes will be weaker than level 1 heroes even wen not considering suboptimal stat distributions...