@sny_pher's snip.
Excellent post, very moderate and thoughtful. 👍
I agree with you though, there is some questioning to be made through the
ethos around DLC. Complex paid content released shortly after the main title is somewhat startling to me, why didn't they employ those resources into making the main game's assets?

That would fit perfectly into your 'negative DLC' theory.
There is however a counterpoint to be made, games are usually a product, they're sold once and no more money can be milked of them until a whole new title is out. That increases the risks in the overall project, mining resources to mitigate them and restraining more advanced and daring paths through the development cycle, leading to new technologies and breakthtroughs in graphics and playability more infrequent.
The steady flow of cash provided by DLC also gives companies much more confidence in updating and improving their products, and also helps to consolidate the customer base through feedback-driven development.
DLC has so many good influence on a game franchise that it actually overcomes the burden of having to pay for it. I'm actually pretty excited that PD is apparently taking this path. 👍