I won't play the tournament, but here are my thoughts on the mappool. Almost all choices of Qz's are acceptable to me. The problem is that level makers want new levels in, while players want levels they like in - so everyone will never be happy with all levels
semi
Level makers hate it because it makes their levels seem crappy

It deserves to be in because it's one of the most popular levels ever
atom heart
I think this is to crowded and hard to move in for a good duel, you could also just hide in the bottom corner with low health for a guaranteed escape
kmc
very good for duels, except if server lags (seeker rains:P)
bblair
best duel level there is
toxin twister
too one wayed and campy, which is definitely ok in 2v2 and 3v3, but in a duel, it'll just be really annoying to play there
je
a bit too campy for a good duel level, but it's popular enough to be in anyway
sbv2
very annoying and campy in 2v2 and 3v3, but ok for duels, thanks too all the carrots. Games can take forever though, if you stay away when your health is low
ayb
Same trouble as with JE, but you can just stay away to avoid getting killed when the enemy camps - it's good that the seekers aren't close to the carrot
swingin' jazz
two carrots => good duels
galactic warfare
can be campy, but that's countered by the carrot having the low ground compared to the surrounding areas
superconductor
tricky movement makes it fun, and fast paced - it's not that easy to camp carrot
abaondoned robotics factory
battle sucks, but this and b1 are like the only ok levels
starlight falls II
wtf is this?:P having unknown levels in the mappool is bad, imo, because someone could pick them and force you to play them
battle game XC
battle1 would have been better imo