back in the old days of mist and automatic leveling of equipment i used to prefer getting graveyard over treasure vault because it was more fun and generally gave better payout
now that treasure boxes drop rarities which fuel the constant desire to get more stuff leveled up treasure vault is now much preferable, it was a change for the better for the treasure vault, but graveyard is just another depth, generally with less treasure boxes available but heaps of easy monsters, its almost a bore
it needs an update to buff the challenge it should provide
first off dust zombies, they fit the theme sure but they are pretty pathetic, allowing either status themed graveyards and/or random status variant zombies to spawn would liven things up a smidgeon, at least then alchemers and brandish charges wouldnt apply status to virtually every monster and on the rare occasion that you do take a hit theres a chance you might end up spasming with shock or burning alive (well as alive as a seemingly robotic humanoid space knight can be)
phantoms - are weak as... they are a little irritating but ultimately only slightly harder to deal with than the hordes of ravenous brain craving loot sacks, they need a buff so that they are a little more daunting to face - extra health would be a good start, brandish charges/combos can currently deal with them with ease, even in 4 knight dives. adding additional abilities in later tiers would be a better boost, either the ability to create revolving orb barriers that deal shadow damage(similar to the status orb barriers knights use and lasting for about as long), attack/attack speed buff to nearby monsters like an alpha wolver or even (while not in orb form) act as a resurrection totem
howlitzers - to my knowledge do not make an appearance in graveyards even though they fit the theme aesthetically and would provide some much needed ranged support for the walking dead that infest the level, dodging a dozen projectiles while killing a few dust zombies is more difficult than slaughtering a score of zombies with a couple of brandish charges
its not about making graveyard preferable again, i think its much better than you actually want treasure vault now, its about mixing it up a little and making the level more challenging/fun
I think if anything, graveyards could use variants and tweaking. There is currently only 1 random depth: Graveyard and treasure vault. What would be swell, would be if there could be another level or two to spawn in place of graveyards+treasure vaults. Graveyards could then be tweaked a small amount: a few new level segments + more phantoms. Right now, phantoms = number of players. How about phantoms = Math.ceil(number of players * 1.5) + 2?
So...
1 player = 4 phantoms
2 player = 5 phantoms
3 player = 7 phantoms
4 player = 8 phantoms
Would definitely make it more challenging.