The "competing product" thing is probably the most extreme part of this opinion.
The most important fair use factor is if the use competes with the original work, but this is generally implied to be directly competes, i.e. if you translate someone else's book from English to French and want to sell the translation, the translation is going to be in direct competition for sales to people who speak both English and French. The customer is going to use the copy claiming fair use as a direct substitute for the original work, instead of buying it.
This court is trying to extend that to anything downstream from it, which seems crazy. For example, "multiple copies for classroom use" is one of the explicit examples of fair use from the copyright statute, but schools are obviously teaching people intending to go into competition with the original author, and in general the idea that you can't read something if you ever intend to write something to sell in competition with it seems absurd and in contradiction to the common practices in reverse engineering.
But this is also a district court opinion that isn't even binding on other courts, so we'll see what happens if it gets appealed.
