For those who insist 2d4 = one die and want to sort them out, more power to you, those who don't, I agree with you.
BUT if you want to simplify the tracking of 2d4 for those who insist on doing it the hard way, just grab some blank D16's off the interwebs, grab your sharpee marker and label them 2 3 3 4 4 4 5 5 5 5 6 6 6 7 7 8 and only re-roll them on an 8.
And if you can't find the stuff to make it, design it yourself and sell the design to a company like chessex and roll in the dough instead of the multiple d4's.
BUT if you want to simplify the tracking of 2d4 for those who insist on doing it the hard way, just grab some blank D16's off the interwebs, grab your sharpee marker and label them 2 3 3 4 4 4 5 5 5 5 6 6 6 7 7 8 and only re-roll them on an 8.
And if you can't find the stuff to make it, design it yourself and sell the design to a company like chessex and roll in the dough instead of the multiple d4's.