Just a few personal suggestions I think could help players on lower-end computers (I also like to log onto my laptop in between classes, and these would make the experience more enjoyable).

An option to turn off rendering of the looks of other player's outfits (just put them in some default robe).

An option to turn off rendering of other players completely. (make this so you can apply it to anyone not in party as well)

If possible, make it so the above 2 don't even send the network data for characters / their outfits so mobile connections are easier.

An option to fall back to pre-rendered lighting (no day/night change, no dynamic shadows, just one mesh of pre-rendered lighting for an area).

An option to turn animations off (only keep aoe circles)