I would get rid of that cara/malts in that quantity, maybe 4oz total. Replace (even bump up) with some light Munich or Vienna or even the Maris Otter someone else suggested above. Also add first wort hopping to the equation, definitely decoction if you can. I would try a different yeast. 34/70 is solid but also bland. It will make a good lager, but try oktoberfest, southern gm, bock, etc. Split the batch and try 34/70 v. something else and you'll see what I mean.