9 lb LME seems a bit much. Cut back to around 7-7.5 lb?
Also 1 lb melanoidin seems a bit much. Cut back to about 0.5 lb.
With a doppelbock, you can safely add all your extract up front. The major effect is darkening, and darkness is just fine in a doppelbock. Hop utilization will also be reduced a bit as you mentioned, but again, in a doppelbock, which is not a heavily hopped style, this is no big deal.
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