Adding slots would definitely increase the cost, which makes it slightly less accessible. At the end of the day, this computer is a toy, it has limitations and that's OK.

However, I'm with you on the full-sized HDMI ports. I don't know why they went with dual mini ports instead of one full-sized port? I think that people wanting to run this with dual monitors will be the clear minority. They could have actually reduced cost with one full-size HDMI port, because the HDMI adapter cable would no longer be needed.