Even current Berserk is better than generic melee units with only small margin like against FU champion. Berserk die to Leitis, Keshik, Aztecs, Japanese, Teutons champions etc. 65 food 35 gold unit would heavily countered by +16 HC (even current +10 even is fine) and softly countered by Cav Archers. Being countered by generic arbalest big no because generic arbalest is so common and all purpose unit and 2/3 of top tier civ’s generic option. My proposed Berserk would die all strong melee units just like before. Now, Berserk will have a higher chance to beat arbalest (not counter btw, arbalest still have chance) and great in raiding (current Berserk is good but it isn’t better than fu Hussar still, new Berserk would cover Viking’s weak cavalry).
Berserk being versatile is good but it is neither enough fast for raiding nor enough strong for countering other strong melee units. Berserk must be near to Hussar in terms of raiding ability because Vikings has no cav option for raiding in late game. 8/10 of the civs has raiding unit. I don’t know a civ that has no raiding unit in the late game. Woad Raider, Shotel Warrior, Huskarl are better than Berserk in terms of raiding. I prefer Woad Raider thousands of time over Berserk. Woad Raider need only elite upgrade + doesn’t need huge tech transition + better in raiding due to 20% more speed (1.38 vs 1.15) because Celts is already infantry civ (Vikings also create pikeman but there is no need make all blacksmith upgrade to use pikeman). Vikings’ late game option very limited. Berserk must be strong to compensate its high upgrade (Vikings normally go archers, thus transition into Vikings require not only most expensive upgrade in the game but also blacksmith upgrades. For instance, Slavs have to make Blacksmith upgrade for Hussars, and Knights. Therefore, transition into Boyar only need castle and elite Boyar upgrade) and carry Vikings in late game.