Yeah, I don't have any serious issues with the marketing in and of itself, but it was clearly written with OGL fiasco in mind, and could stand to be rewritten to be more neutral towards WotC and positively focused on their own product.
Whether or not you believe that the antagonism towards WotC is still justified after they backed down, post-fiasco it just comes across as kind of... petty? Like, ultimately, I don't think they would lose anything by rewriting it. But I'm not really their target market, so maybe they have good reason to believe otherwise.
I try and buy other systems. So I'm someone who might be interested in another game.
Here's the thing, though-
If I want to play 5e, I have all the materials. I don't need what KP is selling. And with the CC and basic pdf and all that (not to mention the books will last quite a while) I don't need more.
If I want to play "new 5e," then I'm getting 1D&D- because that's probably going to be the most prevalent in terms of market share and people. Plus, I also run games for local high school kids and I tend to run the game that most people play (D&D).
It's a very weird needle that KP is trying to thread- the desired market is for people that want to continue playing 5e, but don't want to play, you know, actual 5e (because they're going to change it somewhat), and don't want to play the "new" 5e (1D&D). Not to mention that they are excluding anyone who want to play something different!
TBF, since they don't have to move a lot of units, maybe "petty" is a good market for them- the people that want to play a 5e system, but don't want to go with BigHasbro(tm). Of course, the trouble with that niche is that there were a lot of people moving to fill it, or have already filled it.
They have a history of making good products, so I hope they pivot back to telling us why their products are awesome.