but the DLC is being bundled into a cheaper price (all for like 10% of original cost or something), and no longer offered individually
If I'm not mistaken the website mentions it'll be priced according to however much content you already own.
I assume it'll be a regular Steam bundle where you only pay for whatever items in the bundle you don't own, and still get the discounted price. So, should be a pretty good deal.
Additionally, they plan to continue developing the game until October 2018, and all new content from now on will be free.
Overkill are pretty awesome and have pretty well made up for the mess the game has gotten itself into every now and again (see also: an earlier attempt at microtransactions that are thankfully no longer relevant).