If Conor was bullying FW's then Izzy is bullying MWs, strikers are better off fighting at lighter weights for the reach/height advantage in a sport which is dominated by grapplers.
Max Holloway is taller than Conor and cant win at LW either, so it would be fine for Conor to move down and challenge him.
Izzy doesn't look like a skeleton on the scale and he's legit 185er. He's tall but clearly not a big dude.
Don't think that Conor can still make 145 without IV.