While I think a lot of the more common choices would be "cool" (Artificers getting more gizmos, sorcs getting picked for being popular, Marshals being picked because they're new, etc, etc), I genuinely think Berserkers SORELY need more class options / features. Their main problem, as someone who's just had a player switch OFF berserker, is that their MAIN CLASS GIMMICK is entirely luck-dependent. Now, of course the trade-off is Furious Criticals are very powerful, but bear in mind you could easily go MULTIPLE fights without even procing your class's MAIN THING. To my knowledge, there's no like "class currency" that they can spend to manually proc a furious critical or anything like that, you just have to be lucky. Almost all of their "roleplay" abilities are hyper situational, which would be more fine if the rest of the class felt bolstered by it. A lot of their subclasses are either "Good but so stable they're boring" or "One really mega-strong ability and then 3 other 'meh' abilities". Berserkers end up feeling like tanks with no taunt abilities. They're most effectively used when you meta-game as hard as possible, and if you don't they end up being very easy to just ignore because they accumulate a lot of health and resist a lot of damage, but have only like ONE ability with any kind of taunt to it. It ends up feeling like the bread and butter of berserkers is just using combat maneuvers and picking classic barbarian abilities, which is something any martial class can do. Of course, this is just my and my party's subjective take based on playing the class since release.