Whoever told you that must have lied xD the missions imo are roughly the same length and same general premise, they only become short when you level up and don't do the harder versions. There's more variety in boss fights and they're pretty brutal at times too and it's better imo than EV was
The only edge EV had over Renewal is that it has PvP but looking back at it the game balance of EV was garbage and wasn't meant to be competitive since the characters had massive gaps (Ryona being low tier and BV girls being high).