I once had a subscription and tried to read it as much as I could. I don't have a subscription anymore only because I haven't had the time to keep reading it. I now use google to read any articles that have headlines that I think are relevant to me.
Short answer is "probably not." The longer answer is "it could be." You have to know how to filter out all of the noise. They have to write something to fill the page. I do find that the WSJ geared towards business is much more relevant than nearly all other newspapers/websites that are a combination of global news and business.
On the other hand, I listened to a podcast a couple weeks ago where they were talking about whether it was worth reading that much and if it has any type of impact on becoming a better investor (I'm widely paraphrasing). The guest of the podcast made an interesting point. He said that if you just focus on the more microeconomic reports such as annual reports, quarterly reports, transcripts, etc. you learn about the macroeconomic issues.
Do you need to read countless articles about how bad oil has been? What kind of actionable information are you gaining? Instead, read the reports of companies who are stating that their business is affected by oil, that the economy has been slowing down, manufacturing is slowing down, etc. etc. As you read report after report of businesses all feeling a similar strain on their financials you start to learn about the macroeconomics at the same time. If there is something out there that is important to your general knowledge, some form of news that is relevant, then someone you talk to will probably bring it up in a conversation and what they tell you is probably enough information to understand it. You don't need to read a few thousand words to tell you that there is still threats of terrorism around the world.
Personally, I prefer to invest in smaller cap companies, mainly in the microcap area. You aren't going to hear about those tiny companeis in the WSJ so better use of your time is going out and actually hunting for them.
Two good articles to read are:
Guide to Reading for Investors
and
What to Read in Investing
I have another PDF of a good topic of avoiding news, but I am going to be late for work so I have to run.