Berserk is a bit unpredictable, and Suggestion is fine; I didn't know they made it non-removable in 1.3, why the hell would they? How are you supposed to fight it now, does dark magic rule or what?

You misunderstood me. As a rule, it makes sense to cast Berserk and Suggestion on 1-2 squads, and they don't always move immediately after your hero. When casting Berserk, you know for sure whether the enemy hero will have time to (attempt to) remove it. With Suggestion, due to the sharp drop in initiative, it's not as obvious. Often, they don't have time to remove Berserk from a dangerous squad, but they do manage to remove Suggestion. But, of course, it all depends on the situation. If the opponent has no Light Magic, then it's very likely that Remove Curse won't work either, even if they have it.