This is my line of thinking. I don't know that anther 50 HP is going to motivate me to upgrade my Gen 2. Yes, the nicer interior and rear suspension is nice, but I don't think it's worth the 20K or so I'd have to pay to upgrade. Honestly, since my offroad needs are light at best, I think I'd be better off in a lariat or platinum with PB, with money left over for upgrades. Though likely I'll just keep what I have.
It's entirely possible I'm over rating the impact of PB, but to me, it's not even about the HP gain. If the options are 500HP with or without PB, I take with PB.
The other question is, if the Gen 3 doesn't have PB, why not? Either PB isn't as good as I think it is, isn't as reliable I think it would be, or Ford just doesn't think as much of it as I get the impression they do.