This proposal changes the use of vouchers from promo sales to just use vouchers to get full items.

This is even worst than what we have now.

If the team uses the "voucher shop" to sell a worthless skin then vouchers will have the same utility than with cryptoeaters proposal, 0.

If the teams uses the "voucher shop" to sell useful things like cards then the damage of vouchers to dec would be far worst than what we have now. People will just sell dec to get vouchers to get the new shinny card instead of buying dec if the card was just sold for dec.

Theres no upside to this proposal, theres not good outcome.
It also puts all the weight and responsability to maintain voucher useful onto the teams back once again.