The real use of the Eidolon points is buying SSR Kaiser Dragon eidolons. At LB0 they have about 10% lower stats than event SSRs and a +30% elemental attacks bonus for 2 turns. That's the best eidolon buff in the game by far, and it's off CD just in time for Bursts. To put this in perspective, that's 4x better than Typhon's buff (which you could stack it with), and increases overall damage by 5-10% (Bursts by over 15%). You'll need 10k points to buy one, or 13 MLB eidolons.
Of course, this won't be a thing in our version for 10 months, and by then most of the players here probably won't even be playing, so it's pretty pie-in-the-sky at this point.