Really they could improve function on all platforms with ram issues if they got smart. They have no memory saving settings at all. They could and SHOULD add loads of settings that would make all devices not suffer this. Most wouldn't even be an issue, mainly just disable textures.
Examples:
Disable particles. (Basically all no importance partice effects are unrendered. Like the walking and jumping particles.
Disable gibs/gore (all blood and death bits are unrendered. Kill a mob, npc, boss, only items appear no more body textures bouncing around)
Disable tile animations. (Torches, crafting stations ect stop running animations)
Disable background animations (clouds, rain, snow, eect stop animations, instead will have a fixed overlay [so you can still see when they are going on)
Go deeping into more advanced settings, you can have a few options that wont effect gameplay but effect worlds slightly.
An option to disable those pointless rocks stalactites, stalagmites, ect. (Basically all non importance randomly generated background objects will stop spawning, freeing up ram and not getting in the way, as well a 2nd option to disable the plant versions as well (grass and stuff as well as the jungle plantlife.) Those won't have much effect, grasshoppers and worms spawn randomly anyway, (and if someone needs them more they can turn grass on)
Basically just adding a bunch of settings to toggle anything of no real importance, stuff that's cosmetic effects,would free up tons of memory and cause the game to be alot smoother.