>>9441529Blockiness is a result of the technique in the first outline phase (pic related). Drawings with a LEGO plate grid as a base makes the finest models, with as good original lines as possible. Blockiness is to be smoothed out in a later phase.
>>9441546Slopes will be used later, after the outline phase. The blocky plates give you a perfect base to be smothed out, much easier than start building with slopes in the beginning.