Sorry to say I had a mediocre lunch at Onyx Fusion, in the old Hall of Fame Building. The decor is really something, huge wall of HD tv screens with island and ocean scenes, very dramatic lighted bar -- we sat on a balcony overlooking the bar. The menu is very ambitious (which was a red flag from the beginning). I ordered an "Asian" pulled pork bbq sandwich, which came with "Asian slaw" and onion rings. There was nothing Asian about this entree except for the hoisin sauce the shredded pork had been doused with. It was topped with oily melted parmesan and the oil had soaked down into the Italian roll, which I had to discard. The coleslaw had a liberal amount of dijon mustard in it. Nicely shredded, that's about all I can say for it. The onion rings were definitely Sysco frozen -- which sometimes has its place in life :) but maybe not at an "upscale" eatery.
My companion's meal was supposed to be Asian vegetable pasta using twisted fresh spaghetti. It came as boxed penne and again, nothing Asian about it. She said it was okay, but probably not worth the price.
We had a sushi roll starter that was passable, but nothing special. It was wrapped in "seared" salmon that was lacking a sear.
Seems like someone can write a good menu, but can't execute it in the kitchen. For 2 people, over $40 (no alcohol, an iced tea apiece). It might be okay for a post-work drink and snack, but I doubt I'll be back. Sad, as Springfield could use some accessible lunch spots downtown beyond the very good Sitar and the old-school but good Student Prince.