Yes I agree that when SBD goes out of wack but is still internally treated as worth roughly $1 USD, things can get a little out of hand.
I vaguely recall that some improvements were made wrt the peg but don't quote me on that. I also believe a pegged currency is very useful and we should revisit it at some point to improve its stability. Nevertheless it has minimal impact on voting behavior and is therefore not part of the EIP.