Non-existence

[LukeMC]

That positively affirming the existence of an independent reality, is to affirm more complexity than does solipsism, and is to positively affirm more than is empirically or epistemically needed from the same data.

No. Solipsism states that the mind exists. In our minds, we experience a universe. One way or another, the universe is there. If it is inside our minds then our minds fabricated the entire universe and all of its wonder and complexities, then forgot about doing this and began experiencing the universe in 1st person as an agent of it. If it is outside of our minds, we are agents of it and can learn to know it- even if without certainty. In both cases, we are only sure of the mind. In the former case, there is an immense amount of complexity assumed.

It contains far more complexity than solipsism; for it affirms far more and far more complex entities and realities than solipsism, out of the same empirical data.

Again, no. An objective universe is less complex than a universe imagined by a being which went on to forget this imagination and began living in this universe and interacting as if it were an agent of it. The assumptions leading from solipsism are either a self-contained imaginary world or an objective, outside world. We cannot claim knowledge either way, but one of these ideas is far more complex.

It can be used to demonstrate that the proposition of an objective universe proposes much more ontological complexity than does the proposition of a conscious mind which doesn't affirm anything outside of that mind.

Again, I'm not affirming anything outside of my own mind. Merely stating that if everything IS in my mind, it would be far more complex than myself being a biological machine in an objective universe. This isn't creating a new reality. It is switching the reference frame of what reality is. It is stating "I cannot know that anything ouside of my mind exists, but in terms of complexity, it makes more sense that a universe does exist, regardless of my ability to prove it".