I get your point, but the previous 50MB barrier still allowed for plenty of bloat. The main ingenuity that it promoted was the ingenuity to host the rest externally to be downloaded on first application launch. This download often took more than 15 minutes (the refund period), causing tons of complaints if the application didn't work for some reason.

As the application is still restricted to 50MB, and the additional space is in the form of expansion packs, this isn't likely to result in larger code. I think it is mostly to solve the consumer complaint issue.