Think it's pretty thin going in with the 9h flush here on the turn, even 55bb deep. What are you expecting they call with, KT? We block a few of them combos.

I'm the caller.

The main problem is that because of the stack depth, the range advantage will be even more pronounced than usual (lower incentive for the 3bettor to include loose low rundowns in his range). Also, the stacks aren't that shallow, it's not like you have pot size bet left on the flop. I think you should be able to get away from this, if not on the flop then certainly on the turn after you get additional info in form of a second barrel.

My thought process was that I thought he could do this with just AAxx no flush or AdAxx so now isn't as concerned about flushes having the nut blocker. Do you think am being to optimistic in thinking like this?.

Up until you see this person use blockers credit them with the nuts. They 3b great AA here and I would speculate that their 3b stat is on the real tight side. Tight 3b'ers generally have tighter continuing ranges. If I am vs someone I know to 3b wide etc I will assume their game is more creative and they are going to be the type to run blocker bluffs. This doesnt look like the player type that is doing that.

If they bet bet they have it up until you see a definitive instance where they don't. I would guess this guy doesn't run blocker bluffs.

OBV depends on how often he uses his nutlfush blocket. All i can say is that he will have nutlfushblocker way more often then nutflush. And ppl thend to overuse the nutflush blocker (every time they have it).

For this stack depth I'm still struggling to lay it down even though it does feel a bit thin. If it's true that people are over using the nut blocker as a general rule then it can't be terrible.

I think someone that 3bets unsuited AA with the Ad blocker is gonna shove the turn pretty often here. This is never a fun spot but I think by default I'm calling vs. people with a normal 3bet range (which could also include the Kd bluff too). If they are really passive pre and post I could maybe lay this down. If you're full stacked I think you should find a turn fold.