Yeah I agree. Also, I don't "get" why this is a double album. It could have been neat if this was a single disc, maybe 60-70 minutes of acoustic/unplugged songs that were re-arranged and sounded drastically different and added new elements, but with most of the songs, they just sound the same but more hollow. You describe it well with the songs feeling like shells of their original versions.
For example, I think they should have thrown in some songs that are known for being more upbeat, slightly heavier and more electric guitar focused. That way, the acoustic/unplugged version is drastically different and they have more freedom to toy around. But when the setlist is almost entirely songs that are already ballads (or to the softer side of the band), the result just sounds like less full versions. The best part about songs like Thin Air or the Untouchables is the build-up and climax, and the richness of their sound. Scale them down to acoustic versions and they get less interesting.
Still, cred to them for including at least a few surprises (IMO) like Electricity and Temporary Peace. Personally I think it would be cool if they had altered the setlist even more. Instead of getting A Natural Disaster again, maybe do Harmonium or Flying? Maybe something from Judgement? One Last Goodbye or Forgotten Hopes would have been cool. Maybe instead of Fragile Dreams (which is always played), maybe throw in Regret or Lost Control for the surprise. I think as a complementary live release to Universal, this one doesn't bring enough differences to the table. The songs you really like doesn't sound AS good here, and there aren't enough changes in the setlist. Sure, some Distant Satellites songs, but overall.. meh.