Imperial Milk Stout

This beer could easily fall under 20C (Imperial Stout) under the 2015 BJCP Guidelines, however, this beer is aged in apple brandy barrels thus #33B (Specialty Wood Aged) is a better category.  The pour revealed a silky black liquid with moderate carbonation that dissipated quickly.  The aroma revealed very nice hints of coffee, chocolate and vanilla in the nose.  The flavor had a nice malt background with hints of roasted malts, chocolate, coffee and vanilla notes.  I, also get a subtle hint of another apple sweetness due to the aging in apple brandy barrrels.  However, this is listed as a milk imperial stout and I didn't really detect any hint of milk or lactose flavor, as if it got hidden with all the other dominating flavors of this beer ? As well, noted on the first sip of this beer is that it is overtly too sweet. Could this be a result of some of the residual flavors of the apple brandy barrels ?  Another possibility is that this imperial stout didn't ferment all the way thru ?  I did get the 9.3% abv alcohol burn in the palate after each sip. The mouthfeel and body of this beer is about medium with moderate carbonation. Overall, this beer had a lot going on in terms of complex flavors presented ( coffee notes, chocolate nibs, vanilla, roasted malts ), however, I didn't detect the milky flavor or lactose as indicated as such.  Just a bit too sweet where it is considerably noticeable, but neverless a nice beer for those winter evenings.