Nah, there isn't too much Van Buren in it. There are many references and things taken out of VB, but imo you can't say it has "Van Buren written all over it".
I played through the game today. The ending was nice and I've made the "boss battle" with talking only. The slideshow at the end was detailed too, but I felt like something had been missing. As example, I didn't got information about Boone, but about Raul, even though I've used Boone nearly the whole game long and saw Raul just like 5 minutes, if at all.