Anyone who's played a class who can use a cure wand has had to do that, what's so special about doing it with a UMD specced caster?
Casters are also low on hit points, and have the worst fort saves, and have the worst AC. Wirey and evasive only goes so far mechanically.
You have a point on diplomacy, but Warforged sorcerors don't need aggro mittigation, they have healing, freeing up a skill point. Besides, bluff is a class skill for sorcerors.