the conditioning difference is a result of the 'size game' that is being played by today's bodybuilders, as opposed to the shape and condition game of the 90's era.
bodybuilders these days are trying to come in bigger and fuller each year, eating more in the offseason, and implementing last-minute carb loading techniques that occasionally backfire and result in a bloated, watery appearance.
oftentimes, these techniques are what result in the massive guts that we see onstage.. huge amounts of carbs consumed to fill glycogen stores + diuretics = poor and incomplete digestion resulting in massive bloat
guys in the 90's cared more about condition and maintaining their lines and the flow of their physiques, than size. case in point, I don't think Shawn Ray ever was more than 220lbs onstage..
if im not mistaken, that photo is from the 1993 Mr. Olympia. I can assure you, Dorian was very, very lean.. the lighting in that photo is deceiving.
I doubt that Dorian and Levrone were disparaging Heath and other bodybuilders when they were at the peak of their game.. id be willing to bet that, like Arnold, they were lamenting the overwhelming presence of the 'pregnant' look today's bodybuilders seem incapable of escaping.
also, in lower level IFBB competitions, there has recently been an alarmingly high occurrence of bodybuilders onstage who look to be a good 4-8 weeks out. Lionel Beyeke and Brandon Curry come to mind. Dorian and Levrone could have been referring to them as well.
IMO, this is the result of handing out multiple procards at national-level shows.. it used to be that only one guy out of the ENTIRE show - the overall winner, would receive a pro card.
now, you have the winners of each weight class getting a card, and sometimes 2nd place getting a card as well.
The idea was to have the guy who won the overall be ready to immediately jump into IFBB shows and place well.. but now we have light-super heavyweights, then 35+, 40+, 45+ etc, all getting pro cards.. the IFBB is being inundated with bodybuilders who really have no business being there.
but I digress