First, I love the HBD. I have had great meals there, and even met "Screen Legend" Roman Holliday once (I hope he's there on my next visit!).
However, there are so many other wonderful 2 TS credit restaurants at WDW (CA Grill, Narcossees, Artist Point, etc.) that I would not use 2TS credits at HBD.
Another way to think about it is the "value" of a TS credit. I've heard a good rule of thumb is that at TS credit is "worth" about $25. 2 TS credits would be worth $50. Take a look at the menu and prices. Will you spend that much there?
Next trip I am going for lunch and paying OOP. All I really want is the Cobb Salad, and maybe a dessert. It might cost all of $20-35 with tax and tip. Not worth 2 TS credits to me, but if I went at dinner and ordered all the expensive stuff, it might be.