I think the problem here is people are asking the wrong question.
Its not "Will Relic make the game F2P?"
Its more so "Does anybody actually want it?"
They've had several free weekends and very little traction - people basically don't like the game and don't want it, even if it is "Free".
Actually, there are always huge spikes in population during F2P weekends, so people do want to play it, but in current era of "pay 50eur for AAA title that require 30gb of patching, because it was released as alpha" and coh2 being... coh2 its no wonder no one buys it.
I mean, would you buy a product that even publisher and developer completely refuse to advertise?