Take my word with a grain of salt because this is my favorite AVN right now and I'm going to dickride this game until it's finished.
Anyways, I don't agree with the idea that the data center fight took too long. I feel like I WOULD agree if it had less importance (like tbh I think the giant fight with Fiona, Vincent, etc that happens alongside the data center fight runs a tiny bit long), but I feel like the 1v3 fight was really huge for Jason (MC).
After the news gets dropped that
he feels completely incapable in all aspects. The fight at the data center needed to be stacked against Jason and he needed to barely survive. I feel like a long fight against clearly experienced killers is the only real way to properly convey the point of the fight and also give Jason some real confidence in his ability. If he would've walked in, fought a bit, and made it out without using all of his techniques and fighting within an inch of his life, he would've left the data center the same character as he came in.
There's so much more to read into about Jason too. His feeling about lack of control he had since the beginning of the game, his inferiority complex, his really strong story parallel with Vincent, his relationship with Robbie, and so on. But to keep this post from being a full page long ill just say that the intense data center fight and his near death experience is (most likely) going to be a big turning point for his character.
Also the fight visuals were just really cool.