What's both funny and terrible about this post;
It's by a publisher about a publisher. That doesn't happen often expect in our hobby/industry. Note this publisher is a FAN of the other publisher's work.
It demonstrates the "damned if you do, damned if you don't" principle to outstanding extremes. Some people want more 5e books. Some PF people are tired of the release-cannon barrage of Paizo. If you wanted to go into publishing, which crowd can you cater to?
Note that this publisher (the OP) offers 183 PDF products online at DTRPG. That's an impressive catalog. So at least the OP puts his money where his mouth is! :-D But what is the total page count of this 183 products? How does it compare to WOTC's page count for 5e thus far?
I have seen several attempts to create new flagships/conglomerates, but they seem to sputter more often than light.
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On the subject of flagships/conglomerates...
To create a "conglomerate" of publishers supporting one system, you need one of those publishers to lead the pack. This requires other publishers to willingly "play 2nd fiddle" to the flagship product. In my mind the big publisher flagships are Pinnacle with Savage Worlds, Evil Hat with Fate, Paizo with Pathfinder, Green Ronin with MM3e/Age, and WOTC with D&D (kind of considering OGL). BRP/Runequest have member publishers that sort of cooperate and sort of don't; it's a big family, but one could argue Chaosium is the flagship in a strange "everyone is admiral" fleet. Open Quest and Renaissance have created an OGL outlet for BRP stuff if you like those games. As far as publisher support, WOTC has been the hardest fleet to participate in since 4e. If you're a proven publisher you could license with them, but licenses don't foster the same cottage industry paradigm as OGL. One could argue that the Savage World license keeps a pretty tight control on the "crap splat bloat" that plagued the early OGL years. You have several options with several approaches depending on your desires.
So that's a lot of competition for this many fleets in this small of a sea...
What do you do? I'm sure bitching at the admirals is going to have little effect. In my experience RPG publishers work at the pace they want to on the stuff they want to and you can either be a fan or find another fleet. It is something that appeals to those who publish me thinks.
Basically, if you want to be part of a fleet, and you don't like your options, you have to start your own fleet. Which means you have to create a flagship. It's the only way you're going to get control of the situation. You just need to model the current flagships, learn from their victories and defeats, and make your offering desirable to other potential captains.
I preach this a lot in threads like this. If you don't like this, do you're own thing! Or maybe explore one of the other big fleets and see if they don't suit you. Either way, this thread demonstrates one obvious truth about our hobby. People gravitate towards the games/approaches they like. There are this many games/approaches because we have that kind of variety among our ranks. If you feel you want to create a new fleet and see if others might join you, then you should. It's likely more productive than joining a new ship every month and trying to foster a mutiny (and less trying I imagine).
Just my two cents...