Since a sample board exists, I'd think that having at least a "preliminary - this may change" schematic up would not be asking a lot.
Going from the picture only:
1) I hope they get to the higher level of funding. Without their custom board, you may not have an LCD. That does not look at all like a normal LCD connector arrangement.
2) They might want to think about including some sort of Y cable for the Z axis. It does not look like there are two Z stepper connectors. A lot of these printers want 2 Z motors.
3) This looks like strictly a 12V design.
4) It's not at all clear what the fusing approach is. That would be a nice thing to know.
5) If the normal Arduino external boot loader stuff is on there, it's pretty well hidden. Again, something it would be nice to know about.
None of that says it's a bad design, or a bad board. Only that there are some things you might want to know about it before buying a couple of them. The LCD is something you would very much want to think about.
Going from the picture only:
1) I hope they get to the higher level of funding. Without their custom board, you may not have an LCD. That does not look at all like a normal LCD connector arrangement.
2) They might want to think about including some sort of Y cable for the Z axis. It does not look like there are two Z stepper connectors. A lot of these printers want 2 Z motors.
3) This looks like strictly a 12V design.
4) It's not at all clear what the fusing approach is. That would be a nice thing to know.
5) If the normal Arduino external boot loader stuff is on there, it's pretty well hidden. Again, something it would be nice to know about.
None of that says it's a bad design, or a bad board. Only that there are some things you might want to know about it before buying a couple of them. The LCD is something you would very much want to think about.