Sure, yeah I agree with regards to the cheaper lines like Hasbro etc. I think a lot of those lines hold more appeal to kids and casual collectors. Therefore if the movie bombs or receives mixed or negative reviews then it turns people off. However, with the high end collectibles for the big boys (and gals) I think we tend to overlook the quality of the movie a bit and focus more on the character design and figure quality. Just look how many people claim not to like the prequels, yet still go buy Anakin, Maul, Obi-Wan etc.
Having said that, personally I couldn’t care less whether they release more than 3-5 figures for Episode IX, as long as they’re the right figures. The Mandalorian on the other hand, gimme EVERYTHING.