I don’t understand how you are viewing Bloodborne as anything other than AAA? Even by your own criteria it definitely fits. It had a big marketing spend, the studio is rather large and employs a lot of artistic staff at the very least, and all that stuff costs a lot of money. It certainly meant a major publisher had to foot the bill for it, same as the Demon’s and Dark Souls games before it which also came with console maker (Sony) or big publisher (Bandai Namco Entertainment) money.
I’m going to stick by what I said earlier though. $59.99 MSRP is AAA. You want to sell for that price, you’re telling me that you want to compete with Call of Duty, especially in the modern marketplace. I agree with you that some games don’t come with the budget or marketing at that level (or even studio size), but the expectation is definitely for top billing on the shelves, both physical and virtual.