Lallapalooza I don't know how often you bring new titles to MEL, but since you said you're rolling out some upgrades, here is an idea: new additions could be highlighted for some time, or up until the next list update. It could be done by several ways, like placing a "New" icon on the game's line, or giving it a lighter/darker background color. A similar approach could also be applied for MTL games that receives an official/fan-made translation.
Another idea is to add the date when a title was added to the list.
Ideally, these things should be done automatically, otherwise it will just complicate things whenever you change the list.