The shuttle bus 3 times in the morning is to Universal Studios. The shuttle to Osaka Station runs every hour, every half hour on Sat, Sun, and holidays. the time to Osaka Station is about 25 min See this link:

https://www.hyattregencyosaka.com/ac...eBus202304.pdf

The New Tram station is a 3 min walk and the Metro station at Cosmo Square is a 10 min walk, either way the total time to anywhere in the city is about the same.