I dislike the use of historic coefficients for placings, unless they're for wildcard entries. Just combine the UEL and UCL places and this should be fine. Always good to see the odd entrants like Leicester, Everton, Wolves etc.
The swiss rounds I'm 50-50 about. A lot of whining goes on about swiss-based matchups, and you can get matchup luck. But it's been a tried an tested format elswehre.