Unsystematic meditations on the Trinity

Last week, I sat by the muddy flume of the Trinity, ate my lunch, and thought about God’s invisible nature, his eternal power and deity. At its best, theology has no technical vocabulary.
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Creator, sustainer, redeemer?

Why not substitute a formula like "Creator, Sustainer, and Redeemer" as a substitute for the traditional trinitarian name of "Father, Son, and Holy Spirit"? Does it matter?