To EDIG, a one time settlement is a royalty payment for past usage, and either a XLA or a future royalty is icing on the cake. Like RP has said, "cross licensing agreements help facilitate settlements."
From day one, when the TX 7 were filed, the theme was "one time settlement and cross licensing agreement."
Now with the CO 19 (raising the bar) it is now, "one time settlement, cross licensing agreement, and if the shoe fits, an ongoing royalty", at least Woverine was.
It will be interesting what was learned/gained from the 1st 7 and how that plays out for the 18 of 19 left, to see what was negotiated, and how this effect round 3? It appears on the surface to be gaining momentum with an upward trend.
Then there's the tier 2 factor ahead.
JMO of course....