I think we all need to temper our expectations haha. I'm expecting a LOT of complaining from gacha noobs who are upset that (i) they have to spend money at all, (ii) they can't play 24 hours a day and (iii) someone else got a character that they want but can't get.
This is my 7th or 8th Gatcha game, so I am just hoping for something more fair than Brave Exvius last fall or Marvel Puzzle Quest a couple of years ago when I quit.
Brave Exvius gave you some decent units, but tried to gouge you for everything. Separate inventories for units, weapons, crafting resources and items, all of which need premium currency to expand? Add in the grindiest conditions to get decent equipment or unlock character bonuses, and a low stamina cap? F off. Once you get all the free stuff from the main quest, free progress slows to a crawl.
Marvel Puzzle Quest kept dropping their drop rates and making tournament rewards progressively worse. The PvP stuff quickly became a lost cause if you werent whaling.
Tales of Link is fine. Drop rates for 5* units are low, and you need a good leader to progress, but they add characters constantly and gice you a ton of free stuff, including premium currency and stamina refill items. You have separate inventories, but one stone increases all of them (other than your friend limit).
Puzzle and Dragons is always giving you free currency, and has great drop rates if you wait for special events to pull your gatchas. Said special events seem to happen every 1.5-2 weeks.
Some of the others that I have played were cut because I didnt have the time. Sorry Terra Battle.