as you said, they lost the actor but not the character…so it’s not really the same…if spartacus continued the show for 2 seasons after the character’s death it’s possible it would’ve become uninteresting…instead of vikings, they should’ve just called the show “ragnar” so it would’ve been easier to bail on the series after season 4 lol
But Gods Of The Arena proved that it could still be interesting without Spartacus