I would like to second this comment that STU is not the right solution. When SBD goes back to 1 USD, this discussion becomes moot anyway. (I don't stress out as the SBD price ratio keeps dropping, I always valued SBD at 1 USD anyway)

I would instead suggest as a hover, that it displays the predicted SBD/SP split, and that makes it absolutely clear what people will be predicted to get. I'm having a hard time determining if anyone has suggested it yet. But no matter, I'll just put it here.