I was actually thinking about making a post with the same suggestion;
Why does tag only allow you to move up or down a tier once a week (and always at the same day/time, which screws over people in certain timezones) while classic and live are dynamic?
I'll second Ratted's suggestion to change it.
I'll also add a couple suggestions mentioned several times before:
Change the bazaar so that you only need to reach Gold once to permanently unlock access to the gold section. I strongly suspect a lot of people in Gold, myself included, would happily drop down to silver and open up spaces for those struggling to reach Gold for the first time to complete that stupid, stupid mission if they could still buy the lego book and sacred shard every month
In addition or alternatively:
Change the Ramantu quest from "reach gold I" to "earn x bars/save up x bars/win x fights"
That way someone can see they're steadily making progress instead of getting completely stuck for months, especially if the main reason they're stuck is they can't play from 1am-3am monday for reset when they have to go to work/school just a few hours later.