I would like to see the sorcerer get their own spells instead of sharing 100% with the wizard.
And my first step in separating them would be to remove 'named' spells like Melf's Acid Arrow from the Sorcerers' list. Those sorts of spells should belong to wizards alone.
[MENTION=17077]Falling Icicle[/MENTION] I completely get where you're coming from and agree that having to continually negotiate with your patron is a divine thing, not a warlock thing. However, can you please provide a fluff explanation for encounter based warlock powers? I'm drawing a blank right now, but I know a satisfactory explanation must exist.