I would respectfully disagree. Not about Jones, he's great - but about his development by the writers.
In the episode where Lorca was abducted by Klingons, Saru tried to figure out how to be a good captain. Essentially, he researched it on Wikipedia. He quickly realized that was not the way to figure it out, that leadership can't be learned from a chart. He struggled.
But by the time of the 13th episode, with Lorca gone and then revealed, and the need to attack a superior foe foremost, Saru stepped up big time. He inspired his crew to look for a better solution, denying the 'no-win scenario.' He was strong and assertive, a good leader. During the battle, he was quick to understand what was happening and quickly guide his bridge crew, motivating them to faster, better action without being harsh or clumsy. And when it came time to fire, the normally polite and timid Kelpian had no compunctions about yelling 'FIRE!' (Okay, that last is Jones, not necessarily the writers.) I loved that!
He has had a *little* development, which I think is a good thing. He needs a lot more.
I would add that throughout at lot of the discussion in this thread, Saru has been overlooked as well. We can't focus just on the humans, people!!