Eh, I don't know... You can say that she has done too little of performing this year, and basically only one off things, which is fair enough, but I'm going by the consistency regarding how subpar -overall- she sounds now. It's worrisome that since about the Beacon shows of 2016 up until now she's been consistent in that she doesn't sound that good (with that private party earlier this year and the show in Austria being the worst offenders). She was on SUCH a vocal high up until the final dates of SSF tour and then bam she hasn't been sounding strong since then. That's what I find worrisome. Her chest voice and middle register especially sound so limp right now. She usually bounces back pretty quickly, but not this time. So far. And I'm concerned she's been recording with this voice... It sucks she let golden vocal periods like Beacon 2014, Beacon 2015, SSF pass by and seems to be in the studio during times she hasn't been sounding stellar live. I really don't mean to be a wet blanket, but...
To me it's clear she hasn't been trying to "Bounce back" though. She's been out a lot, focusing on silly side projects, etc. I don't know how when she's performed like 3-4 times this year very sporadically we can freak out about how she 'can't bounce back'. This time a year ago she sounded amazing. I think there's a tendency for fans to freak out that she's only as good as her last performance.
If she still sounds a mess by the end of the tour then yes I'll be concerned. But off a few one-off performances I am not going to freak out. She's been "done" so many times vocally - the TAOM tour/E era, the start of the Elusive tour, the Rockefeller mess, and now. Have a little faith