Admittedly I haven’t played cube much, but the ones I have played have two attributes I don’t like very much: They are incredibly expensive, even if you don’t take into account all the foiling and other hard to find versions, and they focus too much on powerful cards and synergies instead of interesting strategies or interactions.
Now, I haven’t really build a cube before, so I’m clearly out of my depth, but gladly, I have Dunning-Kruger-effect on my side (meaning I don’t know enough on the subject to know what I don’t know, so I can walk into this confidently and without fear). Hopefully, when I finally get this done I have learned much in the process and can teach you something as well. Learning together, yey.