I don't understand how anyone feels screwed by this. The game came out over a year ago, so of course anything involving the base game is going to be less expensive than what you paid for it. That's not getting screwed, that's just how reality works. You could have waited a year for the price to drop, but you decided you would rather pay the launch price for the privelege of playing the game for a year. The lowered cost of the full bundle also increases the chances of new players picking up the game, which is good for everyone.
If you don't want to pay $40 for the dlc upgrade then you still get to enjoy a ton of free content. I imagine they're relying on the sales of the Aftermath paid dlc to help offset the development cost of all that free content. They could have easily just locked everything behind a paywall. But instead, they're giving everyone free content and letting those who are interested in the additional DLC pay extra to get it.
Want to know why shit like microtransactions and season passes are becoming the norm in full-priced games? Because the cost of games hasn't kept up with inflation. A $50 n64 game would cost $84.12 today. A $60 Xbox game in 2005 would cost $78.77 today. But god knows if they tried charging $78 for a base game, people would lose their minds, even if it had no microtransactions or season pass. I'm no fan of that nonsense in my full-priced games, but I also understand that the developer has to make a profit, and so I'm happy to support a season pass or paid dlc over the gambling microtransaction bullshit EA puts in their games.
I imagine this anger and entitlement is a big reason these games aren't supported for very long. Development costs a ton and there has to be some way to recoup those costs. But anytime they try to charge for that content, people lose their minds. Would I prefer to be able to just pay a tiny bit to download a character and ignore the story dlc? Absolutely. But I'm also happy to support NRS while they continue to support the game. If you're hoping for a KP3, additional story content, or even ongoing balance patches, then the best thing you can do is suck it up and support the game with your wallet.