Regarding the other commentary Heidi made to Mondo during her workroom visit . . .
JMHO . . .
Sure, one could definitely look at what she said to him from a standpoint that she was being mean. However, I also think that another angle, or standpoint, one could view her commentary to him from would be the angle that, at the end of the day, she is the client (and BOSS, as one of the designers said). It's HER line, therefore, like it or not, she has the right to make commentary to the designers regarding what she happens to view as she tours the workroom.
Could she have maybe soft-pedaled what she had to say? Perhaps. But, again, at the end of the day, it's HER name and face that's on the line --- like it or not --- and therefore, she's well within her rights to step up and speak on any aspect of what she sees as it's being created. And, quite frankly, if the designers can't take her heat, her calling it as she sees it, then as far as I'm concerned, they need to get out of the workroom permanently and leave the show.
Unless each of us are bosses on our own jobs, I'm sure that we're asked or told to do things that we think are a waste of time, or that could be done better another way, etc., etc., etc. But then again, how many of us actually expend the time and energy to argue with a boss regarding things we're told to do, when we know good and well that to do so might very well result in our dismissal from our position?
JMHO and thoughts/observations.