It simply is amazing. I am over here right now (not exaggerating) in a kind of amazement/euphoria over the idea of a one board/one kite quiver for most (not all days). Factor in Donna, and two kites has both of us covered, almost always (she won't ride in 25+)
So we got two people, three boards and two kites.. great bargain.

I think the waroos in general ride like bigger kites than their #m says.
I mean, Ebone on a 9m in 12 knots.
Also, the 16m Waroo flew like a 21m C with unreal low end... and I know there is zero chance of riding that in 20.

The 15m Ion (to me) flies like a 17m Fuel (low end) and seems like an 11m Fuel top end (that's 20 mins on it in 20+).

So, not really disagreeing with your take on your Waroo.. that's why I stressed upper end on the Ion.

I already know buying a 16m Waroo as the one kite choice would be a BAD decision. Not that the kite isn't great.. it just has more power and less top end, so you'd get cut off at 15knots is my guess.

So, we are both right

That's why I focussed on the windspeeds so heavily (so that any kite could be framed into that scenario)

Anyway, I am grabbing a 15m Ion and riding it most days :P