I think he just made up some bs reasons for why some characters couldn't be included.
I agree. There is no way I can get behind "blade would be too much like dante". If we can make Jago and Shadow Jago feel radically different with the same model and very few new animations, they can easily make any brand new character feel as unique as the designers want.
Also the 'can't do 2-in-1 character' for cloak and dagger thing.. P Wright + Maya say hi.
Its all just off the cuff interview stuff imo. I wouldn't trust any of that as 'real' other than that they did consider those characters at some point.