Battle pass archive coins cosmetic options change?

Dear BLIZZARD/NetEASE,

If anyone decided mid battle pass to change class, there was good change you made a while back, where the gear would change class to class. Additionally, if a player had two or more classes on the same account and had enough coins, after level 15 they could use the coins to purchase the gear for the other class.
I was wondering why you either removed this or did a retrograde backwards?

It doesn’t really devalue the battlepass from its original released form way back, but I must have missed where we were told it would change in the season 37 information and why? I figure there’s a good reason and I would not ask if I knew the answer.

Afaik the purchaseble current cosmetics for other classes only appear after you’ve reached rank 40.

2nd character hit 40 cannot get current set anymore with coins. They do not appear.