EL have an extra KO round. Many teams from big leagues had decided to down tool and drop out early. Many good team in CL is not as good when they drop to EL. Team with EL pedigree not always that good in CL nor in their own big league. It's a different know how game.
Football needs context.
Ok, but none of that changes the fact that the better teams by far do better in this competition than do Eastern European with bad pitches.
The Eastern European bogeyman is a myth as I stated earlier. It may have been true in the past when travel was not what it was or stadium standards not what they are now but as we saw with the Bulgarian team we played UEFA will change the venue from a goat track if the stadium is that poor, the team travels on chartered flights with top notch accomodations and dedicated staff to ensure they get the best possible conditions to travel in.
The biggest threat we have of going out in the round of 32 is finishing 2nd and playing one of the top teams that drop down from the CL, this should not even be a debate. yes playing Krasnodar wouldn't be ideal but it isn't a worry either.