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As for an earlier start for the BT grid - imho, it would be better to start SoD earlier then, because there are far more restarts in SoD (and tournaments, accordingly, take up more time in real life).
Besides, what difference does it make to you, you'll be playing poker there instead of Heroes. And if you do play, then only in BT, so personally for you there will be no difference.
The position of those who want/can participate in both tournaments is what matters here.