Thankfully the PNG Blue Lock doesn't happen until season 2 and from what I recall season 1 was a very solid production. Season 1 is 24 episodes as well. Both these shows will run 24 episodes before 2nd seasons become a factor. And who can say if Toonami can get more Tokyo Revengers when Hulu has everything after season 1. Maybe they can do another deal where they don't have VODs like with Bleach.
I likewise don't see this as a solid sign the CR blockade is over. Probably nothing short of Jujutsu Kaisen getting added or My Hero Academia coming back will convince me otherwise. I very much doubt that Kodansha being the publisher for both these series that are joining right now is merely a coincidence. And if Kodansha is the bridge that could be what gets Fire Force back. I'm still holding out a bit of hope that TMS will bring Dr. Stone back to Toonami once it's over. Unfortunately Toho seems to be no help at all with MHA among other things.
Also regarding Blue Lock and Tokyo Revengers, both these shows are shounen but they're at least not traditional battle shounen and that helps Toonami feel less monotonous. A sports anime and a time travel suspense thriller respectively. Still wish they'd run a seinin more often but this is decent compromise to loading the block up with battle shounen.