Throwing spellid in the tooltip is a fantastic idea. I'll definitely do that.

In regard to positioning. There is a bit of a complexity in regard to the anchor point and that fact that you really don't have control over width/height. If your anchor point is always upper left, then no issues. But if it's something else then things might not line up as one expects. I might change the positioning behavior before the next beta. Long story short, the "free flowing layout" design causes more issues than I'd ever have anticipated!