Jack Dorsey is on a mission to save Twitter.

The founder and CEO's latest move? The social network plans to stop counting photos and links in the 140-character limit for tweets within "the next couple of weeks," according to a new report from Bloomberg.

The move will free up more space for text, and Twitter users have largely heralded it as long overdue.

But the change — while welcome — does little to fix Twitter's underlying malaise.

In fact, it typifies the main problem at the heart of Twitter: Dorsey has been running the company part time for nearly a year, and little has changed since he returned to the company as CEO.

Twitter has an impressive list of woes

Let's look at where Twitter stands right now. Its stock sits at $14.28 a share, just above its all-time low of $13.90 (earlier this month) and far, far below its record highs of $69 way back in 2014. The social-media app has become a comfortable home for bullies, trolls, and bigots, who have poisoned the atmosphere for regular users. Its active-user count is flat-lining at about 300 million, albeit with a minor bump in the latest quarter. The number of tweets sent on the service has plummeted, according to API data, with 303 million sent in January — down from a peak of 661 million in August 2014.

Business Insider

In short, it's no secret that Twitter is struggling — especially when compared with the runaway success of rivals like Facebook, Instagram, and Snapchat. It is struggling to gain users, its existing users are tweeting less, and investors are losing faith.

These problems are a key part of why Dorsey, who founded the company and was CEO before being ousted in 2008, was brought back as CEO in June. The intention was that Dorsey, who had also become the CEO of the mobile-payments company Square, would have "the moral authority as a founder to push teams to make big, bold changes to Twitter," as Twitter COO Adam Bain put it.

But the changes that are being pushed aren't really that big or bold.

The ship has sailed on millions of potential users

Twitter is not a young company. Launched in July 2006, it is now a decade old, and is well recognized by most thanks to the massive cultural influence of its highest-profile users (one of its enduring successes). If people don't use Twitter, it's not because they haven't heard of it. It's because they don't want to or have used it before and didn't stick around.