Counterpoint: the biggest problem facing opinion journalism today is the competition. Actual news reporting is expensive and slow and sometimes doesn't pan out, isn't very profitable and there isn't that much of it. But you can get opinion everywhere these days- cable TV news, internet streamers, internet articles, it's everywhere. That suggests that there is actually a huge demand for highly opinionated work (and also that it is remarkably cheap to produce), but whether it's something like Daily Kos or Free Beacon or Alex Jones or Newsmax, it seems like everyone can find their own personal brand of opinion journalism that both flatters their own pre-existing opinions and at the same time molds them. Lots of narrowband broadcasting in that space, and the daily papers are really struggling with their goal of broad reach- they are getting outcompeted in each specific niche by a specialty player that caters to a much smaller, more specific set of opinions. (They try to have a diverse range of OpEd columnists, hoping that if you don't agree with Paul Krugman maybe you'll like David French, but that's a hard thing to pull off these days when your competition is just people of one specific ideological wedge.)

In theory your idea would be good, except when I look at the market I don't see anyone actually succeeding at that, which suggests to me that it's not actually a very large market of consumers.