All RPGs have repetitive combat, honestly.Well Witcher 3 has "better" combat than Witcher 2 for certain, but i also heard some people dislike the combat in Witcher 3.
Even Origins on Nightmare was still spamming the same spells in every fight, that's just how RPGs work. Or Mass Effect's pew pew detonation fest.
Witcher 3's combat can be pushed to nigh-dark souls level with a mod or two, if that's your thing. Rebalances to stamina/vigor usage and damage will make it a proper challenge.
Apart from Dark Souls I can't think of a recent mainstream RPG that REALLY has good combat.