I agree about the blandness of the Irwin bass, but it isn't bad. I wonder if it just isn't what we're used to hearing Phil sound like. I don't recall seeing any threads about that bass where it was being commented on favorably. There was one on RU Kind, that I can't access anymore that may have had more info. I really don't know much about it. The pickups look sorta' like those PAF DiMarzio P's that were all the rage for a while.
I must confess, I'm mostly just drawn to the Reckoning album for what's on it, and the presentation of it than the overall sound quality. Probably because it comes closer to my bluegrass/oldtyme roots, and what I'm still playing on gigs today for that matter. Still sounds like Phil to me, just subdued in comparison to the 70's sound.