I agree. Something like CEP for PES would be great..The game has taken huge steps on the graphical area thanks to Juce and all the editors but the database/OptionFile has been forgotten. There's League patches for almost every interesting country, we can make faces/stadiums/etc to all of them but we are always limited by the OF. Besides that, it's impossible to recreate real competitions (and that's even more annoying...like playing the CL without the home & away).
Since it seems that it's very difficult to edit the game itself on this area, it would be better if someone (with enough knowledge) could create a mod outside the game that would launch the PES for playing matches (like friendlies). It's possible to retrieve information from PES (like results, goalscorers, cards..PES launcher for internet play does that), so we could at least have real competitions (right number of teams, real UEFA competitions format, others like Royal League, lower divisions...) and a table with goalscorers and stuff like that.
This would be a good step (including the option to create competitions to play with friends..just like sensible soccer)...maybe in the future could be even more creative steps like the ability to get offered jobs at other teams..(like the mod having a formula according to your wins/team...sensible soccer had it and was made many years ago...). That would expand the game experience for many time... but I'm affraid no one is taking time on this area of the game.. I can't complain, I can only be thankful for all the editors have given us so far. And that's much compared with the default version.
But, if someone could try...it would be GREAT.
(I remember that someone released a mod for GP4, outside the game itself..and it was very good)