The arcade is supposed to be an area for gathering materials for crafting, yes? So why not make it the ultimate area for gathering materials for crafting instead of the slightly better sometimes one? You could just add treasure boxes or something boring like that, but you could also add EXCITEMENT and WONDER in the form of DANGER.
And I do mean for boss levels too. Royal jelly? Stick on a danger room, chance for it to spawn. Firestorm citadel? Danger rooms mid-boss level. Right now, there's zero reason to run the arcade version of these levels after you've unlocked the mission, which means that their gates are a massive waste of content that could be feeding me arenas.
Another benefit to this whole scheme would be that players would sometimes be paying 3 energy + the cost of revives every level now, instead of just on clockwork tunnels. It may just be 3 energy and occasionally more for a revive, but that's going to add up, especially if you find on average 2.5ish every arcade FSC run and go for all of them.
--- a few ideas for danger rooms ---
Graveyard:
Available at the start of the level;
spawns 10 extra phantoms and opens the door to get the boxes..
Candlestick keep:
5 friendly knights in boxes around the edges spawn; (these increase # of ghosts)
3 waves of nothing but grave scarabs and kats;
TONS of room for how the candle mechanic could be brought into this!
Jelly King (1st/2nd level):
Fills a small room with 20-30 slimes, such that there is no where to walk outside of the party button;
Next wave fills up just the party button area with gun puppies
Treasure Vault:
Pressing the button fills up a room with treasure boxes;
~70% of the boxes are reskinned monster boxes
no reward afterwards
Roarmulus Twins (boss fight):
Before the fight, as a sort of "boss enhance"
Makes it to where the monster spawners spawn gremlin stalkers instead of scuttlebots;
Twins have 2x health
Nice idea. It'd give players a reason to run boss levels in the arcade after unlocking them through the missions and the same applies to the other levels. What if we had a room with some Almirian Royal Guards in FSC? Also, can we have the Jelly Green Giant danger room back?