In all honesty, it is about time Riot stop treating EU scene like NA scene
These scenes are vastly different, and impose the same format for Challenger Series Qualifier make no sense
Tthe existence of farm teams is not something that depends from LCS/CS format, in the various years C9 has had multiple farm teams (both in NA and EU) and even now has one, CLG has their farm team, TSM had their farm teams, FNC at some point had a farm team, SK (when was stil a power org in LOL) had their farm team, CW had their farm team, etc...and the success of these farm teams in developed talent widely varied depending on how these orgs were building it
For example SK Gaming Prime in the years has developped a relevant number of players that have reached LCS because they always built their team upon upcoming talent not putting former CS/LCS players in their roster, Fnatic academy had less success becausew they built it the first time only as a place to Rekkles active while he waited for age requirement for LCS to kick in, and the rest of time they failed because they didn't invested lot of time/scouting resources on those teams
And to develop talents through these farm teams, you need to have a competitive and tournament environment where these teams play each other, which Riot can't force to create if it does not exist in your scene already
The format proposed for EU is awful, because you are promoting mediocre national teams only in selected countries (selected on which bases, given that at least France and UK could organize tournaments with more quality than Spanish and German one if given notive) while putting lot of orgs which have international rosters in jeopardy
If in NA there aren't enough tournaments and there is a desperate need to build talent without having enough orgs in competitive underwood to provide that, fine, you can decide for NA to lock league and let the system going through farm teams.
But you can't lock EU scene in the same way