People just need something to complain about.
Whatever the color, you'll find someone that doesn't like it.
That's pretty much it. It's an outfit that cannot be changed, therefore there will be a significant chunk of people who will dislike it. There's no such thing as an outfit that everyone loves. Personally I'm fine with it, it looks pretty sweet on my inquisitor, but it's quite subjective after all.
Solution is to make it craftable and so on, and I _BET_ that was one of the features they were forced to cut, as it's too obvious.
That said, why Beige? I think a previous poster nailed it: it's neutral and works great in any lighting.
But anyway, ultimately there will always be people who dislike a particular look. Conversely, I'm sure there's a huge chunk of players who love it, but nobody's going to be making a thread about THAT... whereas people with something to complain about almost certainly will (which is why this forum overflows with negativity, when DAI is a masterpiece).