As someone who flies almost exclusively Mobula, this ship has shitloads of potential.
The ability to have a constant trifecta is devastating, and in straight dps playoffs you'll almost always come out on top. Of course, since it does indeed have low health, it won't be long before you're almost dead. At this point you take advantage of it's insane manoeuvrability. Now, of course it has the turning speed of the moon, but that's why I almost always bring phoenix claw. And it's speed is hardly impressive, but that's not really the point a lot of the time. What it does have is great acceleration, a lot of the time it's acceleration that allows you to escape more than straight up speed. And it's no secret that it has the best vertical manoeuvrability of any ship, meaning it's easy to get out of enemy arcs.
Say, for instance, a pyramidion is charging straight at you. What you do is drop out of the way using it's insane vertical speed and burst away underneath it using its acceleration, getting you firmly out of its arcs and giving you a huge window of escape.
However, I will say that the Mobula does need support to be properly effective in a fight, since if it is focus fired it will go down extremely fast, but that's no huge issue, that just makes it balanced.
Weapon wise I use a brawling setup, but that's just because I don't ever snipe, but I can imagine it being a good support sniping ship if that's you thing.
Even then it's best not to think of it as a straight brawling ship, it isn't the ship that rushes in first, it's more the ship that waits just on the sidelines and swoops in after.