I'm an advocate for random battles disappearing entirely in favour of visible enemies, so this is a worthwhile change. (monstervine.com)
In its place, Snake can mark visible enemies with his binoculars, making them appear as visible waypoints wherever they walk. (polygon.com)
Way back in 2013, the 2001 PlayStation game Dragon Warrior 7 got an extensive Nintendo 3DS remake in Japan that upgraded the entire game from 2D to 3D, added a ton of new content, and updated the battle system to feature visible enemy encounters rather than random encounters. (polygon.com)