Seeking writing advice: Tropes vs writing block?

I've started writing bits and pieces for S.I. again, but not nearly at the rate I was writing before my hiatus.

I'm beginning to wonder if I should cheat a bit, and deliberately leave some of the details I'm having trouble getting myself to write about vague, and explain it away with some memory problems of Bunny-the-narrator for that period. Goodness knows there are plenty of ways Bunny's brain has been fiddled with so far, so it's not without precedent; and if it gets me over the hump and into full-scale writing again, it might be worth including the trope for that reason alone, let alone adding another mental issue to play with narratively.

Anyone have any thoughts?