That's exactly what he does for large portions of his fights. Its why the fights with Hendricks, Condit, and Rory were so competitive.
No. He does fall into lulls of low output or outright inactivity, not that it's a good idea to conserve energy but it hasn't failed him yet aside from the first Hendricks fight in the judges eyes.
Also, most fighters that are elite (in any division) such as GSP, Rory, Hendricks, & Condit don't allow or engage their opponent once they attempt to reset. I know a no name MMArtist in me, that has picked up on that and added it to his game. Lawler does the same thing, and everybody knows Sleepy Lawler is followed by Rage Mode like a boss in a Nintendo game.
Lawler has footwork, timing, spacing, & distance down. To say a veteren of the game for as long as Lawler who managed to win the UFC title this late in his game will simply stand slackjawed and stupid is in itself slackjawed and stupid. He still attempts counters & counter counters in Sleepy mode. Haven't you noticed he lands the hardest shot(s) in every round? If he has failed on that even once I guarantee you he attempted to do so.
The man has consistently shown he is crafty, precise, quick, durable, & powerful. He is a hell of a fighter for anyone to go up against, even a talent like current Wonderboy. Wonderboy may be even faster, just as if not even more precise, and just as crafty if not crafty in a kickboxing/karate way- but is he as durable? He's certainly powerful, but can he consistently take shots from Robbie Lawler who nearly killed Diesel during a finish while green?
I don't know what to expect in this fight aside from both fighters bringing it. I think it's going to be long and bloody. I don't think Lawler's legendary chin is going to give out, not in the first round, off chance he gets finished in the first round I'm thinking a nasty counter spinning back kick, I still believe Wonderboy getting KOd or TKOd in the first is more likely than Lawler. I believe Wonderboy will continue to remain true to his word that he hates exchanging and prefers to pick apart his opponents- until he realizes Lawler is patient and can counter strike & even counter counter & etc. with the best of them. Not that he'll try to exchange right away after, but he'll get frustrated & try to mix it up as well as get increasingly desperate to land & Lawler starts to shine from then on, making it his fight. 48-47 or 49-48 Lawler.