I 
) I think I'd be better buying another PCB. I can solder alright but fixing traces and pads... meh I think its a bit above my abilities. I'll hold onto this PCB for a later project but grab another. Just got taxes back anyway... whats another 32$?
Edit: ordered a new PCB from MK
Edit: I didn't see that you already bought another PCB but I still recommend what I've said below.
At the very least, give it a try. I've pulled a few pads (and one trace) here and there and have fixed it relatively easily. If you need guidance, I, and likely many others, do not mind helping.
Solder in all the diodes and the teensy. Then, before soldering in switches, hook it up to your computer and program the teensy with the proper firmware.Once you've got that done, use ESD safe tweezers to bridge the connection for each key and test it on keyboardtester.com
To bridge the connections, you literally place the tweezers into the two holes where the switch pins go and connect them. If it doesn't register right away, fiddle the tweezers around.
Note: When you press the ALT key in keyboardtester, you will need to click on the window to focus it again, otherwise the keypress won't register on the website and you might think it isn't working.
This shouldn't be difficult and is worth it. You're right. It's just $32. But this is valuable as learning experience. If you ****ed up, well you didn't mind buying a new one anyways and still gained some experience.
Should one of them not work at all, you can create bridges to unused pads. For example, the pads for my S65-X 2.25u Enter key were not working, so I bridged them to the pads that were right next to it and now I've got myself a working enter key. I also used this to fix a few keys on my MF68 that I managed to harm while desoldering it for the second time.
