I just checked the Brazil website it still has not updated the visa info.
https://www.gov.br/mre/pt-br/embaixada-camberra/English/consular-section/visas/visit-visa
If you know what you want email your choices to "specialrequests@rssc.com" with your booking number. Also you can email "Spl_ExeConcierge@rssc.com" with your choices.
We've been on the Mariner five times never had a problem with our cabins we just got off in Dec. The crew has been very responsive to any requests from us on every cruise. We board again May 30th.