Feels kinda silly. This really reads like "Boost founder wants to buy back his company at a discount, which would conveniently happen if Sprint were forced to divest".
What *would* be useful as a merger condition is a lock on all MVNO pricing, such that e.g. Ting could keep getting the deal they do right now on each of Sprint and T-Mo once the two merge, valid for, say, five years. Same with Google Fi.
The former founder of Boost calls for divestitures from the combined company but not of spectrum but of the prepaid brand(s). I'd be OK with that.