We were just talking about this in the Box-Office thread!
1) They've tried this before as mentioned, with the Jinx spinoff. Die Another Day's reception (It made money but was laughed at until the series basically died) prevented it from going forward (I think Halle Berry went ahead and made Catwoman instead?)
2) The fact EON is thinking about it doesn't really mean anything - they'd still have to convince a studio that it's a good idea to pursue. And so far as I can tell, of the three studios that really, really want it (Sony, WB, and surprisingly, A24) two of them are already neck deep in Cinematic Universes that they're already having big problems managing well, and the third probably doesn't really want one.
It's entirely possible that EON pushing for a Cinematic Universe might hurt their value to a studio, not build it up. Who the fuck would want to take all THAT on if they didn't have to? Typically just making one Bond movie every two years is a herculean mess of clusterfucks. Making one a year with characters who don't have the cachet Bond does?
3) Jeff Sneider, who is apparently the primary source on this, is couching his report in all sorts of weasel-words, which tells me he's less interested in getting this right and more interested in covering his ass for the pending debunk that will probably be coming, because he's floated shit like this before (most notably, that Miles will be the MCU Spider-Man, I believe) and gotten burnt.
Could they be thinking about it? Maybe? They thought about putting James Brolin in the role in the 80s. They've thought about a lot of things over time. You stick around for 50+ years some interesting notions get entertained. And it's not like EON hasn't been all about trendchasing ever since the Moore days. This is a damn big trend.
But I dunno if this is going to actually be a thing.
(Although if they do pursue it, I think this ends up making codename theory being implemented into this continuity almost a certainty)