@Bernard said:
I barely notice it if the Db is dropped from the left hand. Think of it as changing the voicing (dropping the LH Db) versus changing the harmony (dropping the Gb).
Yes, it makes total sense! I'm looking forward to trying it this evening. The big question is how it feels under my fingers. I will report back!
And thank you for this suggestion, now I won't look like an idiot in my lesson tomorrow for not having noticed this!