Both are great points and I agree completely. If you have the support of your team for a custom datasheet, than you can let the other team agree to it , or not. There's some really balanced customs out there I've seen.
And the named characters are actually in a codex, or two I'm sure. Atleast w/ Eric and I; we'll have to talk as to which Dark Angels we will have running our army. I know it's in our codex about only having one named character.
One question I am curious about though are characters, or monsters w/ just unreal powers.Example are the masters of the chapter, which cost a pretty good amount. Is it do-able for more than one imperial player to use them? Say I bring mine and Micah uses some for his bloods. That'd greatly upset the assests. Technicially it'd be different chapters and do-able, but somehow it just adds alot to the fight to keep track of.What are others thoughts on this?