I bought the deluxe edition on sale for about $14 overall, and even then I can't recommend this DLC:
The "Holy Radiation" debuff introduced can stack up to 10x, offering CON and healing bonuses at the cost of heavily decreased hit chance, speed, and critical chance. It does NOT decay on its own, requiring certain (in most cases nonrenewable) materials to reduce. These nonrenewable resources are also used to craft some of the upgraded items as well, disincentivizing you from wanting to cure your allies and potentially forcing them to be stuck with this debuff permanently. The means by which you can get renewable cures require certain NPC vendors to be available, and it is possible to lose access to every single one of those vendors entirely if you don't make the right choices (alongside the fact that their inventories won't restock if they still have anything in stock that you sold them). This, combined with the fact that the status effect is then introduced in certain ambush encounters in the main world even after the DLC, leads to the potential risk of permanently ruining certain characters and followers from whom you can never remove the massive debuff to hit chances. My only current access to the cure is to go to a single vendor who sells three cures, buy out his entire stock (which is thankfully only three other items), quicksave and then quickload to restock him and then do it all again. Without this single completely skippable vendor, I would have no way of curing myself.
The last two encounters rely on enemies fulfilling certain objectives/being in certain places to continue, which can be incredibly unreliable and leads to encounters becoming overly long (I had to skip multiple turns on the second-to-last fight just waiting for the NPCs to cooperate). Some objective-based encounters could potentially last up to an hour- and saving is disabled while in encounters- which leaves little room for experimentation and means having to start all over on a failure.
It pads for time with unskippable dialogues and animations that have no reason to take control from the player. These are infrequent, but occur just enough to be obstructive to the pacing.
ENDING SPOILER: You can kind of guess where the story is headed from the start if you've ever even heard of Fallout's Children of Atom. Another "Turns out the good guys weren't so good after all, don't you feel foolish?" type beat.
My suggestion if you do play is not to spend a single resource on curing Holy Radiation until well after you've completed the DLC, and don't intend to return. Or, just look up how to get the proper ending before you even begin and plan accordingly because then maybe the vendor who sells the resources to cure you might still be available by the end (idk I assume so).
Wasteland 3 is a fantastic game that this DLC goes out of its way to taint, and if I could remove it from my active save entirely I would.