This is the root of the problem. Oga's has a relative capacity of about 100 customers at a time, with most of those standing only. There are only a half dozen small banquettes that seat six, with smaller parties placed with smaller parties to fill all six seats in each banquette.
That's a daily capacity for Oga's of less than 2,000 customers over a 16 hour operating day. That means that Oga's can't even handle the daily guest occupancy of the 1,100 rooms of the Contemporary Resort, much less the other 25,000 hotel rooms on property.
Oga's is small and cramped, with mostly standing room only. It would be a great venue for a theme park that only got one or two million visitors per year. But for a theme park complex that gets tens of millions of visitors per year, not so much.
Who approved a very small Cantina I wonder?