In a recent interview with TMC, Crowfall's Executive Producer Gordon Walton explained how the skill system in the game looks like. Generally Crowfall uses a system that's similar to Eve's prerequisite style skill system, with some changes.
"One of the first aspects we want to try a differently is to approach how fast the player gains skills," according to Gordon. "To this end, Crowfall skills have a value from 1-250 with a specific maximum for a character based on a combination of the players archetype, promotion class, disciplines and advantages. I think the example we have given in our advancement FAQ was the Legionnaire maxing his potential polearm skill at 175."
The purpose of using large number scale is to let players feel skill gains and let them always have 1 or 2 point gain in a skill. Players can train multiple skills in parallel and if they are VIP members they can train even more skills at one time.
Gordon also talked about the team's concept on stealth skill. You can read the entire interview at TMC.