In another forum I once wrote (a bit tongue in cheek) about the "Ugly heart of Europa-Park": The stretch in the middle of the park from the Flight of Icarus Balloons, Battle of Hydra, Traumzeitdome (now all removed) over the outdoor queue of Euro-mir, the green snack place, the stinking Silverstone cars to the arena of football. I argued that in this area, where the park has its thinnest dimension in its hourglass shape, so everybody has always to cross it getting from the front to the back of the park and back again, the aestetical standard is lower than in all the other areas. Not hideous per se, but sub par for Europa-Park. One reason is that a lot of those things are either very old or only thought temporary like Traumzeitdome and Arena of Football.
Luckily, now demolition of the first 3 attraction has removed some concerns, and I hope that in the next years the Park will approach the others. I know from an interview that the green snack is already planned to be revamped, I hope that Silverstone will change to electrical like the train did, and we all assume that Euro-Mir will be refurbished in the near future. The arena of football was at a time planned to be removed for the new coaster, as we learned from the documentation, and it is now used as a showroom for Yullbe VR, so I am quite sure that there will be a change, too.
My personal micro-pet peeve: Why has nobody removed the Wild West style windmill in the Austrian quarter yet? It is the last remnant of the former "Adventureland" theming of this area of Alpenexpress and Wildwasserbahn before it was reconfigured to Austria in 1992.