I think the "Conor's power doesn't translate to 155" is overstated. It's kind of similar to the "Conor isn't a top 5 contender" anymore. It might be true, but I don't think there is really convincing evidence to support that it is true. I mean, it's only natural punches aren't going to affect bigger guys quite as much, but look at the guys he hasn't been able to KO.
Nate: has never been stopped due to punches despite taking some beatings throughout his career and it was at 170.
Poirier: even since moving up to LW, he is much bigger and durable than the guy that was KO'ed by Michael Johnson. He's been in some wars and has won them all.
Khabib: I'm not sure Conor really landed any clean shots on Khabib, and if he did, it would have been in the 3rd round after he had been dropped and pounded into the canvas for 5min.
Poirier said after both fights that Conor can punch. I think even Nate said he hits hard, just that it wasn't anything he hasn't felt before. I think it's still an open question whether he lands on some of these other guys what happens...except Gaethje. I think Gaethje eats them similarly to Poirier.
I also don't really get the discrediting the Eddie KO like he's some glass jawed schlub. Eddie had been fighting a long time and was only KO'ed once prior and it was 9 years before Conor. Eddie was also in 2 wars with Poirier and 1 with Gaethje AFTER Conor, so it's not like Conor got some damaged guy who couldn't take a punch anymore. Conor sat him down however many times in the first round and then finished him and made it look effortless.