Sounds good boolz (even listening on crappy computer speakers right now).
A couple comments relating to what you mentioned about the 'hollowness' and the vocals-
Having lived our whole lives being intimately familiar with the human voice, we tend to be more critical listeners to vocals than other instruments. Also consider the ability of some sounds and instruments to be able to stand more echo and reverb than others and still be perceived as natural sounding. A third related factor is the ability of more open arrangements to sound good with an amount of echo or reverb that would swamp a dense arrangement. For instance-
In the Keb'Mo samples the ambience on the instruments sounds nice to me here at the computer, conveying an open, big-room, live feeling of space while still sounding clear. It's the vocal where I notice the echoing 'hollow' sound a bit more (which is also effecting the instruments of course), not enough to be bad, but more than you'd like I'd guess. If the arrangement was denser everything might get swamped more.
In the Hiatt 'Have Faith' clip I can hear less echo on the vocals so they sound clearer, but the open arrangement still sounds good and live. On the 'Riding' clip the arrangement is denser and though not objectionable, the instruments start to get blurred a bit in the long reverb time.
It all comes down to the sound you like and what you are happy with. I like hearing the ambience in a live recording, but I still want clarity, presence and definition too. There's a balance to be struck. Sometimes in a bad room you just have to get relatively close to one of the speaker stacks where the level and clarity of the direct sound is strong enough to make the room sound less objectionable, even if that places you way off center. Often there is a bit of a vocal hole in the center of the floor up close to the stage. Proximity to a speaker will almost certainly make the vocal clearer and will work better in an echoy room for denser music than heard in your samples. You might try that next time you record at this place and compare. Even if you are close to one speaker you can still get a nice stereo sounding recording with good room ambience. Most big sound systems are in mono anyway.