From what i have figured out, your Switch account became a Pc account when you activated Cross trade/Save. Nintendo has agreement with De that complicate thing with plat.
Issue: IF they let you return to switch trade only there need to be 15-30 days between leaps to stop profiteers from playing the markets. Rifle riven mode is 25p on pc and 15-20p on switch. on the flip side, ember prime is 120 p from Pc to about 200p on switch. see the new issue that is made?
Option: They need one hard trade mash that add switch users with there plat as second type, aka GoldStars (Keep it Nintendo) then you have options. Trade switch or trade reg, but only spendable in respective markets.