I highly doubt people will actually pay 17-19 lives for this on turn 1. You'd need a god draw with 3-4 mana floating after the wheel to have a somewhat reliable kill. If you don't win that turn, you're pretty much dead to anything.
@fsecco I think you mean, “if you are on the play and you fetch, your opponent can guarantee you will lose the bid”.
Opponent might not want to exercise that guarantee because he does not want to forfeit the ability to activate fetchlands or to cast FoW/Misstep/etc. after the wheel.
I think they would because many commander players don’t have $200-$600 for duals and never will.
Again, that does not work. If they backdoored dual lands like this all it would do would be add another dual. The ideal manabase for that deck would likely still want the original dual and the new one and cut something else like a shock land.
Maybe in a 4 color deck where you don't have room for 2 of each it helps solve a problem, but 2 color decks are sure going to want a second matching true dual.
I honestly think just banning every reserve list card in that format would be a better option than trying to patch it, and that way wotc wouldn't have to print replacements because they are not trying to fix a market problem.
You control the card which the replacement effects affect, so you choose.
EDIT: Evouga cited the more complicated path to that conclusion. It's quite clear in 616.1:
616.1. If two or more replacement and/or prevention effects are attempting to modify the way an event affects an object or player, the affected object’s controller (or its owner if it has no controller) or the affected player chooses one to apply, following the steps listed below. If two or more players have to make these choices at the same time, choices are made in APNAP order (see rule 101.4).