There is a way to figure out the market consensus by looking at the price of the Cards. There one thing getting in the way of merely looking at the prices to form an opinion. Soulbound Cards are very expensive to be made Unbound at this stage. The ones who are going to buy these Cards from the market at these inflated prices are the ones who are the most desperate for them. We cannot compare these market actions against the Cards that do not have an Unbinding process.
The reason I focus on Epic Cards so much is because I find them a lot more useful in Battle. This is partially because they get very powerful early on, making them more cost effective to acquire and use in Gold and Diamond Leagues where I spend almost all my gameplay on. I will present individual Stats by Level for those who are not already familiar with the Cards.