Bond "killed" at the end, eh? Now that would be a risk for the franchise, to put it mildly. They could do it in YOLT and SF because Bond's "death" meant nothing coming as it did before the theme tune. The audience knew that he'd crop up soon in the film.
But bumping him off at the end, or appearing to, as Fleming did to his character in the novel "From Russia With Love"? ("You Only Live Twice" is a different case - here the reader knew Bond wasn't dead, although certainly not himself, whereas "the office" back home didn't.) Depends how you did it, and then would follow the triumphant articles from the Bond-loathers in the media- a small but occasionally vocal group - welcoming what they think is the end of the series. Plus disappointment from the fans and most audiences I dare say, followed by the inevitable conspiracy theories ("He's not really dead you know!") and reminders from those old enough to remember the 1950s that..... Mr Fleming himself tried this with "From Russia With Love", only to revive 007 in "Dr No".
It could be made to work - with the end credits re-arranged to read "Will James Bond Return?" - but I think it may be a risk too far for these producers.
As for the echoes of Tracy in Madeleine - not lost on me either, although to judge from the Spectre trailer Ms. Swann seems far better informed about her father's associations and activities than Tracy ever appeared to be about Draco's. She knows the name of a certain global but secret organisation for one.
(It conjures up a picture of domestic conversations between Mr White and his daughter; "So Madeleine, how was your day?" - "Oh, just another routine day of treatments at that alpine clinic. And you?" - "Oh, I've been busy laundering billions in dollars from an African wardlord, passing them on to our banker who lost them on the stock market and the poker table, assassinating him and then blackmailing a British treasury official into recovering the money with the help of an MI6 agent. We were hoping the treasury girl might turn this MI6 chap, but she went and killed herself instead. Still, at least we got them money in the end. Apart from that, nothing special."
You know, it does make you wonder. In QoS neither the CIA nor MI6 had ever heard of Quantum, yet the trailer for Spectre clearly shows that Madeleine Swann has heard of SPECTRE. Unless she's Mr White's insurance policy - if SPECTRE gets him she has instructions to sing like a canary about Quantum, SPECTRE or anything else?)