Miami is on the bubble Ucla, LSU, Louisville, and Indiana are for sure. Miami, A&M, Florida, Vandy, DBU, Missouri State, and TCU are going for the last 4 spots
National seed just means that they are guaranteed to host a Super Regional and avoid one of the other best teams. If you are 9th you could get put in a region with the #1 team. Baseball is different that they try to group teams together by location to save on travel.