Another DDM!Snape pointer?

[redeyedwings]

No: HPFGUIDX 143858

Just off a re-read (must be 4 or 5 noiw) of HPB, and I found something I'm not 
sure has been discussed yet.

I'm at work, so I have no book to quote from, but I puzzled over it long enough 
last night and today that I think I have it down.

When Flitwick is sent to fetch Snape for the order, and whips past Hermione 
and Luna 'without even noticing them,' (all quotes are paraphrashed, sorry), 
and then they hear a thump and Snape comes tearing out of his office, 
Hermione says that 'they just let (him) go.' She adds (I think) something to the 
effect of "We messed up," and apologizes to Harry.

Now, wasn't Hermione at least (and possibly Luna, though I don't think so) 
under the influence of Felix Felicis at the time? The potion that guides the user 
into making the right decisions -- I read Hermione's we just let him go' along 
the lines of Harry's decision, under the FF influence, that Hagrid's, despite his 
original plan, was 'the place to be tonight.'

So, if FF acts in such a way that makes the user instinctively make the right 
choice, then doesn't it follow that there was a good reason (even if Hermione 
and Co. don't know it) that Snape needed to be allowed to sprint off to the 
tower without delay?

If FF is REALLY supposed to make the user do the right thing instinctively, and 
Snape really is Evil and was killing Dumbledore solely for LV's (or his own) 
purposes, wouldn't the FF make Hermione (at least) act differently, at least by 
making her 'just shoot a curse at him,' without thinking, or act in some other 
way that would slow him up?

Just wondering about it -- I think some of us might be able to take from this a 
sign that Snape was *meant* to get up to the tower to perform his deed, 
otherwise Hermione (and Ginny and Ron when he runs through the battle) 
would have thought that stopping Snape was, 'the thing to do tonight,' to 
paraphrase Harry's experience with the potion....

Wanted to get the question out there...
redeyedwings