I'd like to see those changes first, because there's no doubt it will affect them. Real Madrid are the favorites for now, but they still have some gaps that Barcelona can exploit.
In Several seasons ago I didn't like El Classico because of the different qualities where one team was stronger and the other team was weaker. This happened after the Messi-Ronaldo era. But this season El Classico is one of the matches that I am really looking forward to because both teams are in their best form and both also have equal quality. Real Madrid were slightly better and they only conceded 6 goals compared to Barca who conceded 10 goals. This shows that Madrid has a very good defense which of course is a homework for Xavi to dismantle Madrid's defense.
It's natural to feel that way, especially when Barcelona were in a slump at the time. But they've come a long way under Xavi, and last season they even beat Real Madrid.
Talking about the Messi and Ronaldo Era, maybe I can say that it is an Era where El Clasico matches are much more interesting. Because it is not only 2 clubs that meet there, but also in the match that brings together 2 star players who always compete for who is the best among them. Now it is very difficult for us to see el clasico just like during their era, something that I will miss.