The OP and subject title of the thread is "original functionality," not "printed text."
For the record, I absolutely oppose any attempt to make cards work "according to their text," without reference to a card's design intent or original ruled functionality, both as a matter of principle and as a practical matter.
I've expounded much more extensively about this elsewhere, but trying to get cards to work according to their printed text is an absolute impossibility, both because text is sometimes ambiguous, and, more importantly, because of rules changes that make text obsolete or vestigial. There is no such thing as interrupts any more to take but one example.
Pragmatically, we don't need or want Lotus Vale, etc. to work as the text suggests. That would be terrible for this format.
The idea of getting cards to work like they originally worked, and to remove power level errata is a worthy pursuit.
The goal of getting cards to work like their text suggests, irrespective of original ruled functionality or design intent, is a fool's errand, and Quixotic, at best.