I don't care for the sorcerer's bloodlines in terms of the focus on melee abilities for some of them. There are several melee based core classes in the game and I see it good there being several core casting classes.
I love the wizard in that with a day's notice they can do just about anything. Their versatility in what abilities they contribute to a group is phenomenal. The sorcerer is far less versatile but what they can do they can do very very well.
I have no desire to play a melee casting hybrid, I want a pure arcane caster without having a book full of spell lists to pour over every week to contemplate mem'd spells. I think great things can be done with combining arcane casting with touch spells and being a hit and run specialist on the battlefield, but I think that should be left to the realm of prestige classes.
The majority of core classes are all melee based and having a pure caster that is a variant of the wizard is a good thing. Fighter- melee, Barbarian- melee, Rogue- melee, Monk- melee, Bard- melee/caster hybrid, Druid- caster/melee(shapechanger) hybrid, ranger- melee, Paladin- melee, Cleric- caster, Wizard- caster. I for one want to see the sorcerer kept as a pure caster with the focus being on having a vastly reduced spell list from the wizard but being more adept/powerful at casting those smaller number of spells. Have the bloodlines focus on groups of types of spells- touch focused, utility focused, long range blaster focused, and leave the melee hybridization to PrC's.
My two coppers.
