I might actually prefer Ratland to be spatially disconnected from the rest of the pavilion. The France area and Rat area are distinct universes, with different settings, theme and atmosphere.
Star Trek and Star Wars nominally take place in the same space - spaceships hurling through space. Yet they completely crash, as do WS France and Ratland.
WS France takes place in an idealised, sentimentalised representation of France. Not a time or specific place. *Rat takes place in a cartoon environment also set in France. To add it to WS France is as fitting as Belle suddenly being revealed to be Anton Ego's girlfriend.
* Edit: Although recently the decision was made to set WS in 'now', i.e. real time, real world. Followed later by the rather incompatible decision to set WS into 'fantasy', i.e. not real world, nor hence here and now.