Yeah mate, i wilk for sure keep it going, possibly will play 2~3 matches per week, as previously.
The base purpose i started this/these saves, or basically multiple saves that i restarted 2 or 3 times, was to test my new league structure, trying to fit German and Greek teams, while messing as few leagued as possible.
The results were satisfying for the moment, but i need to progress some seasons further to check how Team from Rest of Europe contribute to CL and EL seedings.
The same with little changes structure, i applied to PES 2021.
Rest of Europe:
Euro League / Bundesliga
Greek Liga + APOEL+ Club Pera (the matrix of AEK and PAOK)
Mix and match of Danish amd Swiss clubs. Since it is on yhe 3F liga, ot goes 8 Danish+6 Swiss teams
Bby this Liga i kept some balance, amd solved the problem of Midjyland playing CL every season, for a reason i don't remember, i don't like them at all.
As for which i prefer , well tough question to answer. Both MLs miss something and habe something morr or less. My HSV givese the BL, i miss a good Bundesliga, last time i enjoyed one in FIFA 17 when promoted with St. Pauli. And as a fan amd supporter or teams of Hamburg i enjoy it. But the usual KONAMI problems, reduce some of the magic, no possibility for generic D2, no relegation battle, or promotion of HSV from Zweite, removes a lot of the magic.
On the other hand, in ML with Burton, i am still in my old structure, as i started this save a little bit aftet EURO of 2021 IRL,.lastbsummer.
It is not such a problem for me, Messi playing still in Barcelona and Cronaldo in Juventus, but the old league structure annoys me a lot.
And my always dream, is to play a ML save for more than 15+ seasons. With HSV it is possible, with Brewers it is not, sooner or later, After 2 seasons? After 3 seasons? i must restart it and bridge the difference.
Combimed with this winter's transfers, which i update, at least the most notable ones.
Finally gameplay wise, I still prefer 2020 gameplay. What's the situation,? IMHO both games when i play with high OPR teams, usuall over 4*, start playing shite, both for CPU amd humam controller.
The situation here is in 2020 the gameplay in that high rated matches, is less frenetic than in 2021,meaning more bearable.
When playing im a D2 with lower team 1*~2*~2,5* i enjoy both

Unfortunately you cant play forever with such low OPR, sooner or latter you either improve or promote to D1 or both of them.
In my very first ML save in 2021, i solved this playing in Thai League, where most teams are below 3*, but once you progress in AFC CL, it is again mandatory to overpower your team, after the grouo stage.