Kilar's response is kind of a ridiculously over-written way of saying very, very little. If he thinks that's going to assuage the concerns of filmmakers (valuable filmmakers to WB) like Christopher Nolan, Denis Villeneuve, James Wan, and James Gunn, he's crazy.
It's definitely a lot of fluff.
Right now there's a 2-front battle of the talent vs the studio at the moment.
1. Back-end deals for the talent. At the drop of a hat they decided to shoot every partner in the foot who had one of these. There's going to be Knives Out level surprise of legs in the theater, no horror movie that will pull in smash hit numbers that makes the current models work. Talent will need to be compensated by the effective neutering of the market. The deals were made in good faith assuming the studio would do its best to maximize the profits of each film keeping them strategically aligned. HBO Max kills that alignment because WB wants content exclusive cheap to drive numbers as they transition. This is what will be fought in court or closed door negotiations.
2. Culture. There's been a lot of question marks regarding what's going on with WB post-acquisition, and as we can tell by departures (check the HBO execs and a LOT of people at DC comics proper), it's not going well. AT&T seems them as a pipeline for content into the ecosystem and assets to whittle down debt.
With legal specifics, it's an interesting argument over who owns a piece of art (yes, technically WB does most likely). These filmmakers, even at the highest level of popcorn tentpoles, try to do their best to be distinctive.
Furthermore, I can only imagine how irate the producing partners are in this situation. WB doesn't produce only in house and take other people's money to make their films, and then WB decided to screw all of them over. If a Disney did this, least they fund internally and everybody is usually a gun for hire.
I don't know what the future will look like, so I won't guess, but I do think WB should've done better in working with people in figuring a path forward.