You know what? I'm pretty darn sure nobody expected Sparda to be an angel in DmC. At least not after all the implications from previous trailers. But there's something called solid proof which is required to seal the deal. Just to repeat, in case you have forgotten, this is a friggin reboot. They may as well make dante wear a thong and make him fight cute puppies if they want to. Of course that won't happen but I'm just trying to make a point here. They could've made Eva a demon in here instead of Sparda - that way, he still would've had his heritage intact. Just a possibility. And yeah, reboots - these cute things aren't always like the Batman reboot where quite a lot of source material is kept intact. NT have already changed a lot. I don't really need to go into details since their work is there for all to see - you know all about the changes they've made.
As for:
You know, the people who got used to the angel thing are the ones who probably already belonged to the pro-DmC faction. These people, as far as I know, consist of open-minded folks who do not condone change and are very much likely to accept change as long as the end product received by them is a quality product. That may OR may not mean that they're happy about some changes. There's a very high degree of chance that they would've accepted it if Sparda was an angel and Eva was a demon in this game - doesn't mean they'll be happy about it. But you're saying 'making him an angel' is something 'we can all get adjusted to' - I'm sorry, you can't speak for others. MANY DmC supporters have been put off by this change in heritage thing. They still support the game, may even accept this change, but they're still not happy about it. Go to CU once. You'll know what I'm talking about.
