Why not have every single champion of Europe included. Then have every second placed team in playoffs with each other. The winners from these qualifiers will go on to play the champions of a European country. You could rate each country depending on the strength of their league, so in the beginning you have the mismatches, eventually prducing the 32 strongest teams in Europe. I think that this way the smaller countries have a better chance of qualifying since they will be no byes to the group stage since every European champion will the same opportunity to get to the final 32. I think this is better because it increases the pressure of the big clubs to finish top of their league, instead of settling for 4th. Also, with the Champions League having more games and running the same time as club championship it will be survival of the fittest, so I think that you will have a rotation of clubs that make the Champions League.
they already have that system in place....... every champ from every country is in the champs league qualifying while some get automatic entry......... and you can expect the weaker countries champions in the final 32 b/c it wouldnt draw ratings... the system is fine as it is------if lets say the champion of europe cant beat a 4th place team from epl laliga then they dont deserve to be in