I've tried this out and it works. Quite a nice interface too.
However, it doesn't automatically pick up installed mods or come with any pre-configured except for ACRE and some French ones, so you can't create loadouts with, for example, the MX Black, HK's or the British infantry stuff. Mods can't be user-inserted either so it's kind of limited to the stock game unless they intend updating it, and being French it's hard to know what is planned.
LEA for Arma3 is apparently being worked on according to the author, so eventually we'll have at least two proper choices, in addition to my hacking efforts.