Maybe Rihanna wants like 2 or 3 more songs on the album. 1 month is more than enough to select 2 more songs and record them. So the album can still come out in 2 months or even less than that.
Also we should not forget that 4 months before the release of TTT, the album was supposed to be a re-release of LOUD, then decided to scrap it like 3 months before TTT came out.
I think we're overracting.