some cool stuff here, but some issues with each of them. i feel like you get about 70% through a project then move onto the next one, at least thats how it seems from seeing your work on here.
for the first design you posted:
raised arch area is cool as it is similar to what they are doing on the new jordan shoe, but as mentioned your proportions are off. with the raised arch your forefoot pad is to far forward and your balance/traction would be thrown off. Also you show the picture of the foot x-ray but in your photo you can tell that there is not enough room at the big toe, as it is now your tow would be constantly rubbing at the top of the shoe, i would say to add about 2-4mm to give the toe room to move a bit. also your foot is sitting REALLY HIGH in this shoe, you have about 25mm of EVA at least under the the heel, i would think that goes against your design of the rounded off heel, which i think could be interesting. and according to your foot x-ray as your template you have the big toe VERY close to the end of the shoe, if this is the case you would not be able to have a traditional toe shape in the top view, it would have to be more of a oblique barefoot type shape. you should try to use a shoe last as your template and not a foot bone structure there are many reasons for this that i dont care to get into right now, or at least if you wanted to use a foot bone structure i would expect you to construct your shoe in a way that reflects that, not the same old way.
magnet design:
you need to post a photo that we can see the shoe, so that is design failure #1 here, nobody cares about the marketing until we think its a cool shoe, at least for this forum i would bet. show us the shoe first then maybe show the marketing image but scale it down so it fits with the website please. other than that this magnet shoe looks pretty good, i think its pretty well balanced and proportioned and the graphic you have on it is interesting.
graffiti shoe:
look sinteresting enough, but again whats the point? i think this could be a cool streetwear shoe, probably not a true performance shoe though.
good work though, but i think most of the experienced shoe designers here are looking for you to put together a full story around a shoe, more than just a couple sketches that aren’t really at the level they need to be before you move to the rendering. What i mean by that is that i dont think any of the sketches/designs you have shown for the first project really grab me as being a nice design, or even sketched well, so i echo that you need to spend more time in that phase, its clear once you have a good design you can render it well, but its the good design part that you need more focus on. Then you end up throwing in a couple arbitrary inspiration images. So there is nothing to really ‘buy into’ other than do i like this design at its face value… that is a risky proposition for a designer, it can work sometimes, but not what i would recommend a young designer or student try to do.