I think it's pretty clear that the "New, Improved" (!) display is NOT displaying 2000 stars in map mode, post-filter.
I guess it is considering 2000 stars for display, then applying the filter.
This results in a Galaxy Map that has been optimised to the point where it has to display maybe twenty relevant systems. Or possibly one. But usually none. We then need to scroll around madly, like someone with poor eyesight reading a newspaper with a magnifying lens.
I'm over 15,000 LY from home right now, but not "in the core". So, like the other 99.99% of players, my Galaxy Map "map mode with filter" is woefully inadequate. The 0.01% of players actually in the core will have steady frame rates... but that's a pretty lousy balance, in my opinion. I was heading towards the core fully expecting trouble with the navigation systems, and wasn't going to whine about it. I certainly didn't want every other player to suffer so I could choose my coreward journey more easily...