why has it gone to single tier?
I like the look of it though. Looks like the main stand (top left pic) has room for expansion with those 'folded down' ends. Could easily join up next to/over the adjacent stands.
Looks like it'll be close to the pitch as well which should make for a good atmosphere and it appears to have kept some traditional feel to it with 4 separate stands as opposed to overly-modernised, futuristic, bowl-like stadiums you sometimes get these days.