I know this is probably gonna get ignored because it'd be saying no to a profitable monetization method but i wanna share my thoughts anyway.
The Mission Pass system is great. I really think it's a great addition to the game but having it plus all the other things you can currently dump your Star Gems on is not gonna be a good look for the game.
In JP version of the game you can spend 80 SG ($4) on a SG scratch which gives you a Account Bound item that you may or may not like. If you wanna trade for an item you want you have to scratch 40 times (32 during special weeks) which means you gotta spend 3200SG (2560SG during special weeks). That's $117 ($96 during special weeks) just for 1 single item of your choice. and many costumes in the SG Scratch consist of Multiple Items.
This already is pretty bad compared to AC scratches where its only 200AC a pop ($2) and if you don't get what you want you can trade with other players and get meseta to eventually buy the stuff you do actually want. Because of this steep price F2P players have only one choice, Laserfocus on Content that rewards SG or else pay. This severely devalues content that might have cool rewards but nobody cares because there are no SG to obtain (like Advance Quests, Extreme Quests, Riding Quests etc.). On the other side that also means that players are incentivised to sit on their rewarded SG for months, maybe even Years instead of using it on stuff like Triggers, SG Shop, Skill tree swap, Pets, etc.).
Mission Pass is a great system to fix that. Similarly to SG scratches it also gives Account bound items however it does not require luck and is always priced the same so F2P players can more easily plan their SG spendings and use it on other sources, like the Fresh Finds Shop. Most importantly it incentivises you to play all sorts of content in order to clear the Tier Missions. Adding SG Scratches would ruin that. Especially since some SG Sources got removed in this version (like the 40 weekly SG in Casino). So please don't add SG scratches otherwise you're gonna overmonetize this game. Because being Premium in JP feels like being a F2P player with benefits and not a Premium player. So far Premium feels like Premium on NA and i don't want this to change.