It's not a question of IF something will work (something broken is a problem, though).
It's a question of IF something brings utility to the mass market and if the mass market is utilizing this service. The NXT asset exchange as far as I can tell works extremely well. Much like BitSharesX's bitassets may work. The reality is asset trading just doesn't appeal to the plurality. It's also reinventing the wheel as if I really wanted to trade $USD then I would use real exchanges and not a crypto.
Main reason people went into cryptos was to escape the inflation of the $Fiat. Why do I need to deal with assets and other gimmicks when they already work pretty well themselves in the real world?
It's also a question of IF something is proprietary. The first mover advantage is great but what stops NXT from doing their own collateral or pegging system or a near-equivalent thereof?