Would anyone dig a few more areas beside the castle?

Sure, I'm with you. Even in the games that take place "entirely" in castles, we usually have gardens and courtyards, underground areas and so on.

Many of the older games do start out in a town setting. The place usually isn't in great shape, sometimes it's completely on fire D:

I think it could be interesting graphically to see what they do with those flames, I've personally enjoyed how fire in video games has gotten much better looking than it used to be (something on fire in an early 3D game, lol wow). It would be just more visually interesting to have varied locations, and again the good news here imo is that when you have a "castle" as ridiculously expansive as something like what Iga usually makes, there's usually room for all manner of not-in-a-building, but still 'on campus' type locations.

Now that Castlevania isn't in the title, I do like to think that Bloodstained doesn't have to be limited to a castle. I love exploring areas that are outside of the castle ... which is why I found Portrait of Ruin and Order of Ecclesia very refreshing to play. OK, there were many copy 'n' paste jobs throughout the areas (including the castles) but, more than likely, that was down to a limited budget.

One area that has often been in the back of my mind is a wasteland of some kind that precedes the castle. Since a wasteland may contain huge amounts of junk, rubbish, abandoned vehicles, old buildings, piles of rocks and other curious oddities, there'll always be a fair amount of exploration to keep oneself occupied. Not forgetting the creepy atmosphere knowing that something insanely horrible is lurking around ... inevitably, leading to a poo-inducing confrontation with a freakish, abomination of a boss.

i think itd be awesome for one part of the castle to be a ruined town within the castle walls, all covered with ivy and bodies strewn everywhere, enemies could even attack from the buildings ^_^

I like the castle most of all, but having a splash of other areas is perfectly fine. kind of like a bridge to a song. it stands out, sounds good, and makes the meat of the song better too. OoE had too much not-castle, and not enough castle for my tastes though.

I want a garden or greenhouse. Or a rooftop. I know that would be weird for a castle, but I think that would be pretty cool.

sorry couldnt resist >P

They should have a graveyard with a duck in it, that drops material to forge a weapon named Death Star

They should add atleast 1 toilet and 1 kitchen in this castle. Some underground areas would be cool too, like a crystal cave or aqueduct. Maybe a factory trapped inside the castle walls? Imagine how cool it would be if you start to traverse in a foggy area, only to discover that it is hiding a entire factory!

But a must is a alchemy laboratory, where Gebel would try to study about the crystals

I'd like hanging gardens, like Aria of Sorrow had

In the Castle Design Thread, I suggested/speculated that since there's a lookout tower type building in the concept art, that maybe there could be some kind of underwater "aquarium" type region connecting the two. It'd be interesting to travel through at least, and could open up the possibility of an interesting aquatic boss fight like Gyorg from Majora's Mask or Serris from Metroid: Fusion.

I think quite a few people on that thread suggested other good outside regions. It's a worthy read for some good ideas.