All your wishes come true: It's long scale, it's TB-Plus pups alright, they are wide enough for both a strong G string to turn heads and derrieres in a Victoria's Secret store and a B string nothing short of mighty for a passive bass (and even most active 5ers) - it would have sunk the Yamato.
String spacing? No fear, the neck is a battering ram and your grubby fingers will find sufficient space. It's a mighty bass and it sounds like it too. Probably Gibson's best 5er ever, a real secret weapon.
For completeness sake: It's set neck, not neck-thru like real Birdies and therefore sounds thuddier than the original, but not undefined. A real TBird is not really a heavy metal bass, this beast could be. Could imagine it with something like Pantera.
Oh, and high register access is more convenient than on the original too. What is doesn't have is the mellow sustainy sweetness of a neck-thru TB, but I seem to be the only person in this forum who cares for that trait anyway.