Doubt they will cut it to 250 and 299 but if they do, I doubt it will have a terribly significant impact. They've overplayed that card.
And yeah, Switch stock seems very stable right now. But it's not too unexpected, Pokken closed out September, Fire Emblem Warriors launches later this month, Mario Odyssey closes it out, the Holidays are approaching. All that combined - especially Odyssey - makes it a sensible time for them to start pushing as much stock as they can.
Oh yeah, I'm not expecting the cuts to set the world on fire, I'm just basing it on how they've already cut the new Madden 18 bundle from $279 to $249 twice in the last month, and were offering their 1tb models at $299 plus a free $60 game for three of the last four weeks. Plus, a $349 1tb bundle would look rough next to Sony's Cod WW2 limited bundle, which will be a 1tb model at $299.