I've seen some of the clips from tonight's show on YouTube and LaBrie sounded OK. He's had a pretty rough run this tour judging from most recordings I've heard but I feel definitely the night off helped him get in a better spot vocally.
I understand people are not feeling very excited for this release, but it makes all the sense in the world to record and release this show. SFAM is their money cow and they gotta keep getting milk from it as much as they can. That's not meant as a criticism in any way, because I'm probably buying it because I get excited every time DT works and records new stuff live. Also, I feel that DOT is probably their most acclaimed MM-era release up to date, so documenting this particular moment in time sounds like a good move. (I know that ADTOE had a pretty good reception back in its day, but it still had that "DT without MP" feel to it).
That being said, I would've rather had an Astonishing live release. It's quite a shame their biggest stage production ever didn't get a proper documentation (or maybe it did and for some reason the band opted to not release it). Also, the highly rumored Back at Budokan show from the Images Anniversary Tour would've been a nice release as well. Maybe they're planning a massive 3 tours-Blu Ray release? I know that's probably 95% unlikely but bands like Nightwish have done it. It's definitely doable, but I sadly do not see it happening. They have the Budokan footage (which is gorgeous by the way) and every show they've done in the past 10 years recorded in Pro Tools. It's just a matter of business, I think.
In a final note, I'd love if DT did something like Metallica's YouTube channel. I'm quite aware that Metallica is in a whole other level (financially speaking) and they can basically pro shot every show they do and release hundreds of professionally filmed and mixed shows, but I feel DT has the infrastructure to do something similar. YouTube is where every video ends up nowadays. Blu Rays aren't even a big business anymore (I'm not sure they ever were), so maybe DT can catch up with the times and do something interesting with their brand new release? I dunno.