That's pretty much it. It also doesn't help that the team is now drawing worse with a playoff contender then it did a few years ago.
2008 - 2010 - averaged around 22 - 23,000
2011 - 2013 - averaged 18 - 19,000
2018 - present - averaged 13 - 14,000
Tampa Bay Rays Attendance, Stadiums, and Park Factors | Baseball-Reference.com
In all these seasons the Rays have been a contender and yet their average attendance has declined by nearly 10,000. The location of the stadium has remained the same the entire time. It appears fan apathy has reached an all-time high even with a very successful organization. This is a sign of a market failing and there is no remedy as the no current or future owner will fund the entirety of a new stadium - the only way one gets built as the city and state will not participate after the Marlins debacle. The ROI will not be there for 100% privately funded facility either - not with the fickle fan base of Florida. The likely solution will be relocation in a few years.