My partner and I dined twice at the Crown grill twice in November on the Grand out of Melbourne. I read the review you refer to in your op and had a similar experience.
The steaks were average, not up to the standard advertised (lacking taste and texture). More like what you would get at a good RSL or a local pub. We brought nice red wine with us (corkage prepaid) and had to ask for red wine glasses on both occasions. The wait staff seemed stressed and rushed which did not make for a relaxed atmosphere. They also gave me the wrong starter lol. I put this down to a lack of staff due to quarantine maybe? Who knows YMMV.
My top tip is to ensure your table is not near the kitchen (the first time we were walk-ins and the only available table was near the kitchen) because it is very smokey. It seems they have extractor fan issues.