I think it very much depends on the price of the asset. For instance, I have always priced my content quite low, even compared to my competitors, because I wanted to make it accessible to indie/solo developers. However, I know of at least one AAA game that used one of my products (they reached out to me directly about it) and several other AA and big-budget indie games that I am quite certain used another. All of these games went on to make millions of dollars in revenue and I got paid $20 for my hard work in most of those cases, $40 in the best case scenario haha… So I have priced my professional licences at about 2-3x the standard ones. I think that is totally fair.
However, I am seeing a lot of the assets that were already very highly priced before now being priced even higher, whereas I would have expected their standard license to perhaps drop to make it more accessible.
That said, some of this could have been alleviated if Epic had opened up a discussion with sellers, or had some sort of best practices outlined before hand, as we were not really given any indication on what to expect everyone else on the marketplace to do or what the norm might be.