Maxperson
Morkus from Orkus
Regardless of how many want "general release content", you've indicated that you would want more frequent release of such material. That you would not be enticed back to the game by the release of one source book unless you knew another would be coming shortly thereafter. Correct?
First, more frequent than what? The nothing put out so far? Yes. More than 1 book a year? No. Second, I have not said that I would not be enticed back by one source book. I said it would depend on how much longer they make me wait, and how much is in the book.
You want a "general" release...so not setting specific would be my guess on what that means, or perhaps a specific setting book that's not already been done. There are folks that consider SCAG and the upcoming Volo's Guide to be the kind of book you're looking for. I know you don't see it that way, and I understand why...but your requirement is more specific than that of many others.
The Sword Coast is a place in the Forgotten Realms, so it's very clearly setting specific. Volo's is also setting specific, but probably more easily used elsewhere since it consists of monsters. It really depends on how much setting content is in it.
And then you also expect them to continue with such material at a faster pace than they currently are doing. Again, that's a pretty hefty expectation. That'd would dramatically multiply their workload (1 source book a year would increase their workload by about 50%) or require them to hire on new designers or a significant amount of freelancers. Either of those has the possibilty to yield positive results...but each also has the risk of affecting the quality of all of their products, and the risk of affecting their profits.
No. 1 book a year is not a hefty expectation. They were putting out 30 books a year during 3e. Adding 1 book a year to 5e raises the number to about 7-8 annually.