I'm going to lay a long term bet on something we'll see when the Classes UA comes out in a month or two.
Two things struck me about the new crit scheme. One is that crits are smaller; limited to only PCs, only weapon users, and only double the weapon die. The other is that in talking about why they took crits away from monsters, he said they were emphasizing recharge abilities, that have the burst damage potential of crits and retain some uncertainty but are triggered at the DM's choosing and aren't as wildly unpredictable (and likely to gib low level characters).
So what if the new model is that PCs get burst damage capabilities that aren't tied to crits? Which spellcasters already have, really, when they choose to break out their high level spell slots. But what if this means that martial classes are going to get more impactful burst damage class features? Something that lets them break out the big guns for dramatic moments without having to crit fish.
Anyway, that's my crazy prediction.