As someone who has been playing a Sorcerer for 7 levels, yes, it's definitely a major addition. You have double the spells known at 1, 3, 5, 7, 9. 4 instead of 2 at 1st, then 8 instead of 4 at 3rd, etc. I'm not seeing the redundancy. Look at Life Domain. Bless? Not redundant -- sorcerer can't do...