I like the mirroring, although honestly the change in colour is more apparent in the screenshot than when playing.
The size of the map feels a bit too big, possibly a few jumppads could shorten a few paths - not too much though, so capturing still takes it's time - but ATM I fear you'll get tired of all that running all the time very quickly ;-)
The teleporters to the roof could also be made 2-way I'd say, this'd be intuitive, realistic and would give people more alternatives than just "jumping off the roof" - I know we don't have falling damage, but still in such a scenario I'd constantly be calling "We have a Jumpe-aaaargh-er!" into my VoIP to my teams sniper and wait for him to take out the predictably dropping enemy!!