There should be graphic options to disable "unnecessary" visual effects, like the battlefield ones, and the visual effects for trample creatures and such, a way to disable all animated effects that aren't important for playing the game could really help performance in old PCs/phones this could bring a better experience for players even to players that have good machines would appreciate not waiting soo much for opponent turn to end, and can bring even more players. I think that some players would indeed opt to disable animations (even the ones that doesn't experience lag) for a more "fluid" gaming. Some options like for example a "reduced animations " and a "no animations' would be really great.