I won't change your mind, but I believe your playing the Vial wrong.
Oh, I can be persuaded, that's why I gave TITI and Scourge Wolf another chance, even if it wasn't good enough to convince me. The Vial has some properties that really fit the deck: It cantrips, removes a blocker when needed and enables delirium when needed. I still have some issues with it.
One is that I already run much better cantrips. The fact that you'd rather pay 2 for a blank cantrip than "waste" your 1 cmc ones is very telling. If you play Vial in this deck, you play it mainly for delirium - without delirium creatures there's better stuff.
My other problem is that it slows down the deck. It takes a spot in my hand that could be a useful spell instead. It will replace itself, but I have to pay 2 for a blank cantrip first. That is ok for a control deck, but I am the beatdown and I'm trying to murder somebody as fast as possible. For 2 mana I can play 90% of my creatures or buff the board with 10+ damage, so why would I waste a turn like that?
If Scourge Wolf performed well enough to justify the slowdown caused by the Vials, that would be a fair deal. In my experience he didn't.
Infectious Bloodlust: I had it in my first brew and it was pretty good. I just wouldn't play them in addition to
Expedite and I personally prefer the latter. It's easier to chain spells with it, it can be used as a combat trick, draw me a card in desperate topdeck situations and is another cheap surge enabler for
Fall of the Titans, which has been an awesome card for me btw. It makes the deck a little more flexible and I tend to prefer the cute stuff over brute force. I absolutely can't fault you for going the other route, though. Bloodlust is a good card.