If you're ultimately planning on planting it in the ground, I would just go ahead and do that when you figure it's the right time to dig it, allowing enough time to re-root before winter. Or did you want to pot it for the winter regardless? Wintering in a pot above ground is harder on a plant than wintering in the ground (assuming both outdoors).
It's best when transplanting bare-root to cut back the existing foliage to reduce transpiration loss, and the new foliage that subsequently appears should adapt itself to the prevailing conditions. Such changes would be expected for shipped daylilies, plus they'd have had the additional stress of spending time in a box in the mail.
The only caveat I might have is whether the dark flower colour would hold up as well in full sun, but that's a different issue. So I wouldn't even be concerned about its adjusting this year, and certainly not next. The current foliage may not be able to take full sun but you'd be cutting that back anyway.
