My recommendations is:
1. Since the District is brand new, its not available as resale yet. If you tend to use the points ONLY at the district then you should keep it. The only question is could you have gotten a better deal, in terms of points and bonus points? - I can't answer that question, since I haven't nothing to compare with. Maybe other buyers at the District can help answer that.
2. if you are in no rush, and can wait, then rescind and re-buy resale in a few years, and then use the points at the district.
3. if you are going to use the points elsewhere then you should rescind, learn the system and buy elsewhere. The points at The district is too expensive to use elsewhere.
IIRC the district points also gives you a booking advantages at other "hilton club" locations, if you were to use the points here also you should also keep the it.
To compare a resale contract for a 2br 7.000 points costs approx 7.000$. But then you wont get bonus points, but you save 18.000$, get an every year contract and a mf starting from 750$ish and up(depending on where you buy).