My two cents on the clip:
Larger 180 degree bend to compensate for grabbing thicker pocket tops etc.
Smaller wings on the tube grip part, they are large and are easily removed/filed, but get them right if you are going back to the board with these.
Material slightly thicker, maybe .2 mm to “beef up” the entire clip, remember that a 1 mm to 1.2 mm thickness increase brings about 70% more stiffness to a stamped item like this, so not much thicker would be a great increase.
Keep the finish, I like the gunmetal/matte look.
I have bent my front “ramp” down a bit, it works for me fine like this, but if you had a slightly concave cut in the end of the “ramp” it would be more flush against the tube…
Better heat treatment the key to steels is in the heat treatment…
I like the clip as it is, so this is just a wishlist/feedback. I know that the clip is not the best, but after years of breaking off knife clips on things as I worked or went about daily life, I adapted to having them on. This one works for me, but longevity may be an issue…
I think that there are other ways to attach flashlights to your pockets as well, and I have found that the small pocket clips on the ’Bay and a couple of O-rings to tie it to the light work very well for me and offer a more “concealed” carry, less likely to snag on things. The clip groove on this light will be perfect for this method… Pics below:
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“:Carry Review of the DQG Tiny III 18650 light.
Personally, I am not going to spend over a quarter of this lights cost on buying just a new clip for it… I put that into a XP-L HI V3 2B on a Noctigon from RMM 
It is all about the light