I'm rooting for Poirier here and do NOT like Conor but he's got a lot more than just a straight left counter. His uppercuts are nasty and his ability to set up his punches with kicks are outstanding. He has great sense of range and it doesn't take him long to get his opponent's timing. He won't have to worry about the takedown from Poirier like he did Khabib so he will likely commit to a persistent attack. Diaz never had to threaten a takedown, but he also took a lot of damage before Conor gassed, and THEN Diaz took control. The thing you have to ask yourself is, is Poirier's defense although massively improved, enough to avoid that much damage early on and if not, can he withstand the damage until Conor fades? If the answer is yes, then Poirier will piece him up later in the fight and do him way worse than Diaz did. He would likely not go for a submission and instead beat him down until the ref stepped in. If the answer is no, and he can't even get the fight to the ground and keep it there, Conor is gonna put him away inside of 2 rounds.