Alright, for starters, let's chill on this "Cesaro needs to be the one to beat Lesnar."
Pull the blinds open and step outside for a minute. Cesaro's nowhere near ready. He's great in the ring. Amazing...but he doesn't have a real following and his mic charisma is BAD.
Nah.
Yeah, his mic charisma needs work...but Brock has damn near a half-Tyson voice at times, and Paul Heyman as a mouthpiece. Plus, Cesaro is far more comfortable as a face, rather than a half-assed heel.
His following would be better if they deliberately didn't try to squash him (i.e., originally sticking him with Jack Swagger, taking away his swing, giving him an annoying ass theme)
And you pointed out what everyone already knows, he's top notch in the ring.
He's also one of the few guys with enough strength and size to seemingly stand a chance, plus as I've been saying...he's the only guy who deserves the undoubted megastar rub one would get from beating Lesnar.
As for how he's been booked recently...a better win average up to a RR win = all the build he would need.