"Needless complexity" refers to situations or things that are unnecessarily complicated or tangled. It means making things more difficult or confusing than they need to be, without any valid reason. Full definition
The Mobile app's Charts deliver the analytics you need for sophisticated strategies, without needless complexity that just slows you down. (generictrade.com)
New York's 2014 corporate tax reform is an impressive first step toward tackling this problem by broadening bases, lowering rates, reducing burdens, and eliminating needless complexity. (nystateofpolitics.com)
The main point is that there is hypothetically room for both systems to exist and function simultaneously, suggesting that at least in nature there is some kind of selective pressure for stochasticity in order to prevent needless complexity and inefficiencies. (sciencedaily.com)