Wicht
Hero
The fact that you happen to be one of those 3PP studios that wanted to release content from the very beginning of WotC's 5E lifespan makes your opinions on the matter less than objective. You can claim WotC would have been better off... but in truth, it's you and other designers like you who truly would have been better off because you'd be actually selling things right now, rather than not selling anything. So it's very hard to take your statements on the situation at face-value.
You are of course assuming that 5e has hurt the 3pp publishers, which I am not sure is actually the case. Certainly its not the case that 3pp are not selling anything. Pathfinder is still doing well enough, and I noticed at BAM yesterday that not only is there still more Pathfinder material being offered than 5e, especially if you add in the APCG, but there are also now some 3pp Pathfinder books there as well, Jason Nelson's Legendary Games books in particular.