Survival game mode is currently unnecessary, a few maps are looped, spawns are the same, and a bit of variety would be nice. Even a complete rework could be good.
Challenge quest new maps, NPCs, bosses can be added.
The item sacrifice button is also very dysfunctional. For example, instead of its current state, if a godlike item is sacrificed, godlike item rate in the next match is very high compared to normal, if it is 1% in a normal match, the button gains function like 70-80% after the godlike item is sacrificed. This doesn't only apply to sacrificing godlike items, of course.
White, green, blue, purple, legendary, mythical, godlike should provide additional bonuses, of course, but sacrificing items with high rarity should provide an additional benefit.
I wrote it separately instead of editing it to make it more understandable.