Big change, need testing, i'm curious to see how it will feel ingame. Seems good from the reading.
Definitely true. that's mainly why we are starting with just the 5 base classes. So far it feels pretty good as Saboteur is really the main new one and I like the Low Profile a lot. That skill makes the first attack against you miss if you are in cover. Let's you play it a bit more risky.
The other big change is really the Assault class no longer starts with Run and Gun (in fact that's part of an unlockable enemy class now) which changes a bit how you play with them. They get Snap Shot first, which is a free attack at reduced accuracy with a cooldown.