Okay. Lets get started.
I start molding and manipulating chakra in my mouth. While remembering what it felt like to have the wind brush across my finger and the process I went through to rip the paper, I manipulate my chakra to mimic the physical qualities of wind. I then exhale and shoot out a stream of wind at a tree 8m from me.
Ahem...Sorry my mouth was dry. Anyway, I believe this to be one of those jutsus that has usage besides offense and defense. If a person is in the air, when the main acting force on them is gravity, their body motion is predictable. They are vulnerable to attack. But!... By shooting out a stream of fuuton, they can move themselves in the opposite direction they are exhaling in the same fashion as a balloon.
This jutsu is also a gust type of fuuton. It lacks the razor sharp characteristics the more dangerous fuuton possess. This means it deals concussive damage. Which is also good too. The most vulnerable parts of the body are the stomach area. There arent any bones to protect those organs from the concussive damage, just skin. Of course this jutsu can possibly carry d rank dotons with it.
Another use of the jutsu is dashing faster. The description does say limbs and not just hands and arms. If a person were to jump at the same time they released fuuton from under their feet, they would effectively increase the speed and distance of their jump. This has other uses besides defending against attacks. If you running at somebody to perform a cqc move, they are anticipating it if they see you. They are judging your speed, and estimating how long it will take you to reach them so they can counter. Once your in range though, you can shoot fuuton from your feet and give yourself an unexpected boost. The sudden decrease in the time it takes you to reach your target can catch them off guard. And the added momentum should add an extra punch to your taijutsu because force = mass x acceleration. A lot of ninja prefer to shoot elements and prefer other to shoot elements. Thinking outside the box like this makes for an unorthodox style of fighting that will catch the unprepared off guard.
Lastly the jutsu can increase jumping height. If the user were to release fuuton from their feet at the same time they jump, they would jump higher and faster than ever before and if they are caught in the air, they can just release it from their hands, feet or mouth to reach safety again.
Aaaaand I'm done with the analysis.