I think it's a good middle ground that keeps both sides happy (made myself laugh there). I think we should be glad it wasn't changed more. It's still visually recognizable as the 60s ship yet in detail it's updated. It was a very gentle approach and it was done as a "starship design" not just a "design" like the JJprise.I don't see how it's so different. Remember this comparison?
It's quite faithful. It's like the TOSprise with a typical eaves facelift. He squishes it, slaps on some wings, fins, etc, and sweeps the engines back a bit. There's not much to worry about here. Be thankful he didn't square off the nay-celles.
If the Discofans are complaining that it's too retro, or too "atomic age," then shouldn't the purist fans be comfortable with it, maybe be pleased?