In terms of the Champions league place, Uefa were very quick to point out what will happen so another Everton/Liverpool doesn't occur.
Europa League winner gets a place in CL, if they have not qualified already. If not, then the runner up does not receive admission to the CL. Just like the rules now.
Should a scenario occur where, a team wins the Champions League, and finishes outside of the CL qualification places, and a team from the same nation wins the EL but finishes outside of the CL places, then 4th place will lose out.
a maximum of 5 teams will compete in the CL from any nation.
Although it was unconfirmed if they would enter at the Group Stage or Play-Offs.