When making an RTS, units in the same faction overlapping in terms of filling in roles is the LAST thing you want to do, and you may ask why. Well, I'll give you an example from a famous RTS, StarCraft 2.
The Firebat and Hellion are both anti-light units that wield flamethrowers, meaning they have the same role, however, the Hellion is cheaper, does more damage, has more area of effect damage, and is more mobile in return for having less health than the Firebat and being unlocked later in the game. Due to the Hellion's advantages in a PVP scenario, the Firebat remained obsolete in multiplayer matches and was rarely built, making the Firebat useless. So, the developers of StarCraft 2 made the Firebat a campaign-exclusive unit.
What does this have to with Stick War 3? Well, Stick War 3 being an RTS (And having been inspired by StarCraft 2) would have the same problems if we added a unit such as the Spearton Dead, which would overlap with the Juggerknight and either get overshadowed by the Juggerknight or make the Juggerknight useless in the current meta, creating a situation similar to the Firebat-Hellion scenario we see in StarCraft 2.
So please, next time you make a fan idea, think about what role it fills in and if it shares the same role with a unit that is currently in the game.
