Are the additions of amber and Munich wasted here or will I get a bit of malty complexity?
Also thinking of adding a few oat flakes to give a smooth body, comments

Lager Malt 2.5 EBC 3000 grams 57.7%
Pale Malt 5 EBC 1000 grams 19.2%
Chocolate Malt 1050 EBC 400 grams 7.7%
Crystal Malt 130 EBC 250 grams 4.8%
Crystal Malt, Pale60 EBC 250 grams 4.8%
Black Malt 1300 EBC 100 grams 1.9%
Munich Malt 20 EBC 100 grams 1.9%
Amber Malt 60 EBC 100 grams 1.9%
Hop Variety Type Alpha Time lb: oz grams Ratio
Target Whole 11.4 % 60 mins 0 lbs. 1.1 oz 30 grams 100%
Final Volume: 23 Litres
Original Gravity: 1.050
Final Gravity: 1.015
Alcohol Content: 4.5% ABV
Total Liquor: 33.5 Litres
Mash Liquor: 13 Litres
Mash Efficiency: 75 %
Bitterness: 34.5168378347185 EBU
Colour: 202 EBC