There is a big problem with rituals being subsumed into utility powers: a Heroic-tier Wizard (Mage) gets no more and no less than 3 utility powers by level 10, 2 more as a Paragon-tier Enigmatic Mage, and only 1 more when they become an Epic-Tier Indomitable Champion.
By contrast, you can have as many rituals as you have pages in your ritual books or scrolls regardless of level.
Thinking about it more, I don't think this effect should be a ritual. "Rituals are complex ceremonies that create magic effects. You don't memorize or prepare a ritual; a ritual is so long and complex that no one could ever commit the whole thing to memory." (PHB p.296) This doesn't fit the fluff of the spell, or the fluff of the arcane-enhanced glib-tongue of a wizard.
Saruman didn't need a scroll.
I should finish my read-through of the RC this week. Now I'm anxious to see what else they've done with utility powers in Essentials. Did they build on this idea, or is Instant Friends a weird outlier?
I'm getting used to this idea of non-combat utility powers, and coming around to liking it. Just needed to think outloud (or online, as the case may be).