The first part of Hebrews 1:1 is alliteration, a poetic literary form where the words start with the same letter, in this case π
(NA28) 1 Πολυμερῶς καὶ πολυτρόπως πάλαι ὁ θεὸς λαλήσας τοῖς πατράσιν ⸆ ἐν τοῖς προφήταις
This is something that is not apparent in English. It has a wonderful ring when reciting in Greek. It always makes me feel good when I read it, and is an aid in memorization.
I do believe the original autographs of the Bible are inspired and that every word is true and meaningful.
That being said I don't think one should over-analyze a single word that was selected, at least in part, because it starts with π in a poetic figure of speech.