Hi there. You have an interesting image here with a lot of details that combine to provide a powerful insight into the person photographed and his profession. I also like the use of shallow depth of field here to emphasise the working area and the shoemaker himself. Moreover, the framing is also strong, with the row of shoes up top and the workbench with more shoes on it on the bottom. These elements combine to make an interesting image.
There are however some elements that, in my opinion, could have been worked out better. Firstly, the image seems to be distorted and tilted to a side. I tried playing around with it to straighten it out as I think the effect of the tilt+distortion doesn't really help the image. I am using an old version of Paint Shop Pro and applied a right-hand rotation of 5.5 degrees, and a perspective correction of -15 points. I'm not familiar with the corresponding figures you need to dial in in other programs, but if you start with a rotation and then try some perspective adjustments, you can probably arrive to this on your own quite easily. That's the beauty of digital I guess!
Also, I feel like the shoe maker could have been better "positioned" in the scene - if you could ask him to move, you could have probably improved on the image if you placed the shoe maker closer to a third, ideally covering that white, rectangular object (Looks like an LED light on top of a gas canister to me) that sits next to him on the floor. I think covering that portion of the image would also reduce the amount of background, sharp detail competing with the shoe maker for attention. Finally, it would also make the image more about the shoe maker in his element, as opposed to a setting with a shoe maker in it. The shoe maker would be better "surrounded" by the shop elements, as opposed to being on the side of it all, as if removed from the context.
Finally, I love the desaturated feel of the image, I think it suits the image perfectly but maybe a bit more sharpness on the person and a bit less on the background would have helped. This could be a result of your settings (slow shutter speed & motion blur), bad focusing, post-processing or a combination of all these elements. If you can take this again, rack up the ISO to say 400-800, and it will give you a quicker ISO under the same lighting conditions (and aperture value). It should be around 1/30 or 1/60, depending on whether you opt for 400 or 800 respectively. At those ISO settings, you can expect a little bit more noise but you would reduce the risk of motion blur significantly.
I've uploaded a mod that is heavily cropped from your original and loses a bit of the setting, but my focus was on straightening this out whilst retaining as much of the context as possible. I've also sharpened the shoemaker a bit using USM.