If practicality were all that mattered, I-30 would be running through where the T&P Building and Warehouse and the post office sit now.
I don't think practicality is all that matters!
With regard to I-30, I think you're comparing the completed relocation of I-30 to the south away from Lancaster Avenue, with the current condition of Butler Place. Well, as far as I know, the closest potential Butler Place fixes comparable to the completed I-30 relocation are to 1) substantially deck-over 280/287 to give Butler Place a meaningful connection to the river, or 2) somehow rebuild Luella through the train tracks to give Butler Place a meaningful connection to downtown. Maybe if both of these were implemented Butler Place could have potential as a nice place to live and work, but I'm not aware that either fix is anywhere near being put up on the drawing board. Are they both just fantasies right now? Like, ten or twenty years away at best?