Haven't watched the full fight just yet (fell asleep shortly after the second, more because I was tired than the fight was boring though) and if a judge gave the first to Shields... well, that's just dumb. From what I saw, Maia should have been a clear winner in the first, Shields did jack despite having a little time on top, and Maia was far more active.
I don't get that simply being in top control means you're dominant. If all you're doing is surviving sub attempts, and you can't pass the guard, fucking score it for the guy on his back, because he's the guy that's being the most threatening. Not based on this fight, but just in general- I hate when a guy is being active and attacking and not getting rewarded. If he's taking some GnP for his trouble, sure- but I agree that guard should be neutral, and the guy that's active is the guy that gets scored.
The whole LnP thing needs to be cut out, because it really is bullshit. The judging is ruining fights, because with good wrestlers realising they can just take a guy down and avoid taking damage to win fights, it's really hard to stop that.
When I spar in Judo, I can defend subs all day against even the most experienced guy without much difficulty. But as soon as I open up to attack, that's when I get caught. If your only goal is defence, it's pretty easy to defend, and if you just defend top control for 5 minutes and win the round based on that- it's lame as shit. You're not fighting, you're playing the infamous Schaub neutralisation game.