The kits were rebalanced since there were only 2 or 3 kits being used most of the time, being Swordsman, Iron golem and Scout. The iron sword you get from Swordsman was sharpness 2, effectively meaning it was stronger than any weapon you'd find in chests in basic & normal mode. It was the rushers' dream. Bringing it back would cause everyone to start using that alone, again. It'd be a way better option than any other kit.
It really had to be nerfed considering it was incredibly powerful. It was almost guaranteed win when rushing someone since they'd have barely any time to gear up a bit armour-wise, to block the incredible amount of damage being dealt. I would hate for it to return, even though normal mode has been given a better weapon (diamond sharp 1). It's just too powerful to give out as a kit.
Yeah and the iron golem kit was also overpowered for basic mode.
Iron golem was also nerfed ¯\_(ツ)_/¯