West Marches games are designed to solve a specific set of problems. If you do not currently suffer from those problems, I don't know that the full West Marches game setup is required.
Specifically, a West Marches game is useful when you have a large pool of players with irregular schedules. As has been noted, creating more GMs solves this problem. Finding player groups whose irregular schedules mesh well with each solves this problem. But if those don't work, a West Marches game can do it. I've seen it work once. A FLGS in a college town ran a game like this. A small pool (often just one) of GMs posted when he could run games. Players would post that they were available (along with PC class/level) until the game was full. Then those players would vote on where they wanted to explore and the GM would run essentially a hex crawl 'discovery' game. The consequences of that session would be recorded.
This let a player tap out of they had a date this week, or had a tough assignment that was taking up more time. And since players came and went, it was hard for other people to get the reputation to get a full table of players. I do know that some permanent groups kind of spun off off this larger game but since new students were always coming to the college town, there was always a new (and relatively large) pool of players.