Keanu Reeves's story sounds believable. No doubts that Keanu would want to have such a huge title all about himself. He could offer more acting while CDPR management saves a lot of money from hiring Hideo Kojima and Lady Gaga.
Regarding "18 different storylines", I'd call management wise rather than inexperienced. Delivering 18 different branches at the same quality as the current main/side missions are would move the release date to 2030 (or even to 2077). CP2077 is not a PnP game where each branch leads to some extra paragraph of text. Each branch in CP2077 requires mocap, acting, and sound recording in various languages. That was simply unrealistic.
I doubt that the "evil" CDPR management just came in and told "good" developers to remove finished and fully functional content. Most likely, they have removed the most bugged or dev time consuming features. If the primitive AI currently in the game is that glitching, then imagine how bugged the "advanced AI" was?
P.S. Being a software developer myself (22 years experience, including 4 years in game dev), I feel the developers' pain. However, I admit that from time to time, the evil manager needs to beat the s**t out of devs in order to move on with the project.
P.P.S. I'm still hoping that some of the cut content will be finished and released in the next patches or DLC.
Problem is, you're never going to make anything beyond a mediocre game if you try to be "wise" about it, much like you're never going to make a truly great software application if all you do is look at lowest hanging fruits while writing off any goal that requires more than minimal effort to reach.
There's a reason why bean counters aren't famous for their artistic touches, and I say that as someone who works software dev with a degree in bean counting. Consider the most "wise" games out on the market currently. You have all the stinking mobile garbage, you have the sports junk (FIFA, WWE, NBA 2K, et cetera) that comes in a year tripple-A upgrade, and you have "live services" where you first pay a tripple-A entrance fee and then run into endless amounts of pay-to-not-suck monetization.
Any of that pile of garbage strikes you as being a good use of time? Sure doesn't appeal to me, that's for sure. But the management behind those games sure are "wise", aren't they? They make a ton of money off products of questionable quality, after all. That also what you want to do? Pass off MVP games, try to rope people into it with dishonest marketing, abandon the project when it can't be milked, and then start over with a new MVP?
Yes, developers do tend to get carried away and lose sight of the finish line, and they do regularly need to be reigned in and get their priorities rebalanced, but you cannot make good things if you insist on constantly being "wise" and "smart" and focusing excessively on cost-benefit nonsense. All you can hope to reach that way is happy mediocrity.
It might have been prudent for CDPR to gut the everlasting hell out of the game, but it also means that instead of a game of the decade, instead of a genre-defining title, they now have an extremely mediocre first title in their new franchise. They'll have done okay on this one, but where can they go from here? MP version sounds cool, but without the role-playing aspect then it's just a much worse sci-fi version of GTA Online. And right now you'd have to be crazy to even whisper "RPG" in relation to Cyberpunk, since they turned it into a damn looter-shooter.
The way I see it, those clever executives were so smart that they've just about managed to kill their new franchise, and that's another general problem with this form of "wise" decision-making. It is unbearably short sighted nearly all the time. Nobody cares about problems down the line, nobody cares about potential down the line, everybody just wants maximum ROI here and now, the most bang-for-buck here and now, and head-in-the-sky dreams like 18 different storylines in one game is just not that. Anything truly cool that hasn't been seen before is not that.
Can you imagine if the LOTR movies had been exposed to that same kind of thinking? Can you imagine if the GOT series had been? How about Avatar, except instead of fancy computer graphics they'd go retro with 1970's style effects?
Meanwhile, look at what Larian is doing with BG3. It's not perfect yet, and they can still screw it up, but their single early access bit appears to have more variance and player agency and overlapping but functional mechanics than all of CP77. Yes, that dear old Swen is moderately crazy, if you ask me, but that is not necessarily a show-stopper, as long as you can tone it down when needed. Now imagine what BG3 would have been, if Larian's management had been "wise" the same way CDPR's management was.