Live edge tables are totally overdone but can still be beautiful in the right space. In a loft they sound logical.

Walnut is such a beautiful wood that a bark will detract from it. It will also date it and walnut lasts forever!

Does it matter? Use pieces that you love in your home.

What's your style? Rustic? Modern? Industrial? Bohemian? Will this piece be the star or the room or an accent?

Who cares if it's trendy? Do you like looking at it? Have you looked at a variety of coffee tables including glass? Walnut is so dark and it wouldn't be my first choice, but to each his own.