Why not mute the lead parts during the intro and still keep playing?
And all I believe 'cheating' is, is giving your audience less that YOUR best. By whatever means necessary...
But using backing parts that you COULD have played, IMO, that's cheating your audience. Just play as much as you can, as well as you can, and your audience will recognize it every time...
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An arranger is just a tool. What matters is what you build with it..!