In a minority of literally one, but isn't the 3♠ bid likely to be slam interest in one of my suits with a control? I have good shape and a first round control on both my suits.
Splinter with a void usually does not help. I would have bid either 4♣ or 5♦ if Exclusion Blackwood. Want to play 6♥ opposite almost any hand, and if I bid it without ace of hearts maybe partner will bid 7 if he has it.
In the rare case in which partner passes 2D (6 count with 1 or 2 hearts and 4 diamonds?)it may well be that diamonds is making a trick more than hearts anyway.