Indiana Jones in Disneyland is a prime example of how to integrate an established, beloved intellectual property into an already cohesively conceptualized land. Granted, the rest of Adventureland had to adhere a set time period, something it wasn't cuffed to a la Main Street or Frontierland in its inception, however in conjunction, it melded well. It didn't feel contrived nor did it significantly alter the existing purposeful design for the realm. Disney of yesteryear made it work and it felt earnest while Disney in the modern era, even with a grand mostly clean canvas given to them, can all but muster a post-secondary education campus that translates to "here, now, today!" via a hodgepodge of clashing stylized buildings and it feels faineant.
Another key layer in the case for Indiana Jones is that the attraction's narrative is self contained. It isn't confined to a continued, traversed storyline and and strict timeline in the vain of Avenger's Campus or Galaxy's Edge. There are references to the films that preceded it to be sure, but they are not blatant and are not relied upon to tell the attraction's story. More liberties can be taken as a result, and what makes it all that more frustrating is Marvel and Star Wars both have the benefit of having a vast collection of source material to build off of than Indiana Jones does.
With nearing seven decades of themed design, master planning and urban design Disney could have done better. Look no further at Hong Kong Disneyland's Marvel themed land. It's merely concept art at the moment and in question if it ever becomes realized but the point is Disney can do better. They simply choose not to.
