It is rotated out basically. In every form unrated, comp and vct for now. They will be keeping the map count at 7 and will be rotating maps in and out after some period of time to always keep it at 7. As far as i know
Yes because 7 maps is the sweet spot. When teams are doing map veto for a best of 3 series it usually goes like this:
Team A:Ban
Team B:Ban
A:pick
B:pick
A:ban
B:ban
Last map is the decider