Having Janusk is nice, it lets sovereigns who dump champion-recruiting stuff get at least ONE champion, who I then imbue and let do all of my spellcasting. Without him, it would be a lot harder to have a sovereign that focuses on the martial stuff, since magic is just such an important part of the game. Sovs with high charisma and such will still be able to get a lot more champions, so it's not like it makes dumping charisma into a no-brainer or anything.
That said, having him be randomized a lot more would be great. I can also see that being able to marry that first free champ might be troublesome as well, in which case I'd say his gender should change to be the same gender as your sovereign, instead of the opposite.