Not currently, although a blue post a while back said that they'd have the season 1 transmog items in a future season. That could be a very long time from now though, considering they still have the rest of season 2 and season 3 to go in order to finish the full set.
Because Legacy legendaries would theoretically reenter the pool after the season, kinda defeats the point of obsoleting them. The transmogs are there and then they're gone.
Is there any way to get the season 1 transmog w/o being in season 1?
Not currently, although a blue post a while back said that they'd have the season 1 transmog items in a future season. That could be a very long time from now though, considering they still have the rest of season 2 and season 3 to go in order to finish the full set.
Because Legacy legendaries would theoretically reenter the pool after the season, kinda defeats the point of obsoleting them. The transmogs are there and then they're gone.
WD Season 8 https://www.diabloprogress.com/hero/finiar-1655/Kildare/84509816
Monk season 7 http://www.diabloprogress.com/hero/finiar-1655/MojoJoJo/42225505
DH season 6 http://www.diabloprogress.com/hero/finiar-1655/DeadShot/75655606
Angry Chicken http://www.diabloprogress.com/hero/finiar-1655/WhoDoVooDoo/68187610
What? Me worry?