You wrote a chord progression using slash roots. By adding the slash roots, you force a bass note to be played and can make that bass go up or down by whole or half steps. This can be very powerful in your composition. However, it’s just one way to do that. VideoTrack was right when he said it’s just different, not necessarily better. A ii V7 I is also powerful and is perhaps the most powerful chord progression in Western music.

Originally you suggested using your ears to determine what’s good. Yes, that’s exactly it. You can experiment with concepts like a descending bass line but ultimately it’s your decision as the composer to write what you think sounds best. Study the chord progressions of songs you think are great. Learn the conventions for what works well. Then when you get good, you can break those conventions and you will know why you did it.

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