I peeked on over at the subreddit for this game...
So many people are saying they need to allow resting/warping from headstones/refill your vials when you go to a lamp
I gotta disagree. The current system is designed to discourage heavy farming. It is the game's way of telling you that having 20 vials for a boss fight is a handicap, not a necessity. It's the game telling you to use the rally system to get your health back. It's telling you that if you just blew through 20 vials on a boss, maybe try a different tactic or go somewhere else instead of bashing your head on a wall for hours. Also, not being able to rest makes bold hunter's mark more valuable when you are actually farming. Warping from lanterns would trivialize the brilliant shortcuts in the game. I find myself actually using them after they are unlocked. It's all a natural evolution of the Demon's Souls system, without letting you hold 100 healing items to abuse.
I definitely did get a little burnt out on farming vials in Central Y, but it gets better. Honestly some of the time I spent farming I should have attempted the boss I was stuck on without any vials instead.