DCL like the Education dept at UIUC pooh-poohed PLATO from the outset. So it's no wonder they had a snooty attitude (and still do) about PLATO. MIT and Stanford had the same snooty attitue. PLATO was electrical engineering-driven, and science and humanities-driven. Very unusual for such a project, but that was the way it was.
Also, my book wasn't about the impact PLATO had on the University, but on cyberculture. The University politicians gladly swept PLATO under the carpet as soon as they could as the NCSA got big money in the 80s, and then the web took off in the 90s. Today it's like PLATO never existed at UIUC. A lot of that is due to decisions the PLATO lab took to stick to clearly antiquated design decisions and a reluctance to embrace client/server and distributed-computing designs. But they had to stick to old ways, because they had an immediate need to deploy, they weren't an ivory tower think tank like Xerox PARC dreaming up what the future might look like in 20 years. PLATO folks were dreaming up the then-present, and they shipped, like any good startup.