I have not reviewed the agreements carefully so I have not taken a side. However, I think that the mature arguments are about who has the right to make the decision rather that what the best (most fair) decision should be. Anti-WLS folks should argue that Verisign is trying to change their fee on a whole class of registrations. No right to do that since that fee is set by ICANN. Pro-WLS should argue that WLS is a whole different service so it is not subject to the fee regulation. After all, backorder services will still be able to add-storm battle over any domains that delete without an WLS subscription.
I'm writing from the ICANN meeting in Rome so I might have a stronger opinion by the end of the week. PM me if you're here.