It stands to reason that if they retire the MSQ roulette(which for the record im not against), then they wouldnt re-assign those rewards elsewhere. The rewards would just cease to exist. When they changed the cutscenes in Castrum and Prae to be unskippable(years ago, long before the instances were re-worked and split into the 3 we have today) they tweaked the rewards for that roulette several times(raising rewards repeatedly until the internal data said the ques were popping at their desired frequency for new players) to make sure those instances didnt stand as a roadblock to new players finishing ARR. So the rewards werent added as a "players need this" sort of thing, but rather as a "heres a bribe for sitting through unskippable cutscenes" sort of thing.