An idea on how to split the Marksmen role into two subclasses.
Emphasis on split, meaning just two. Marksmen have some of the most diverse kits, but they all do relatively the same thing. Deal damage, take objectives, and Carry. It's how they do it that changes between each champion, which is why we only need two subclasses.
To start it off, we'll go with the iconic Marksmen, The Sniper. Snipers Specialize in long range, position based combat. These Marksmen tend to stay behind their Vanguards, Wardens, Battle mages, and Juggernauts. Snipers for the most part are immobile, but bring high ranged auto attacks, and tend to have more utility than their counterpart.
Now, for the Sniper counterpart, Ranger. Rangers tend to favor closer combat than the Sniper, as they have naturally shorter range. To make up for this however, they have significant survivability, whether it be through amazing mobility, outright tankiness, or astonishing scaling with Life-steal. Rangers will always survive longer than Snipers. Where Snipers want to stay behind their beefier teammates, Rangers want to fight with or around them.
Marksmen that fall under Sniper.
,
,
,
,
,
,
, and
.
Marksmen that fall under Ranger.
,
,
,
,
,
,
,
, and
.
Outcasts/Outliers
,
, and
.
EDIT: Moved Tristana, Corki, and Ezreal into the Outcast/Outliers, and added Quinn to Rangers(whoops, I thought I included her!)