Having driven the same 150 mile stretch of French motorway in a 6 speed manual in both 6th and 5th (forgot), I can assure you it makes no discernible different to economy, at about 130kph. So an extra gear change for no benefit
So, particularly in a manual, its not something I'd aspire to (I wouldn't be fussed either way).
I'm not sure on a lot of this auto stuff. I'm more intelligent than a sensor to know when it need lights, wipers etc. As for adaptive cruise, most car handbooks that have it carry big warnings that it may not stop in time if the traffic slows, as they tend to have less braking effort available. I think like ABS in the late 80s, it has the potential to lull lazy drivers into a false sense of security.
Having been looking for a replacement for my MFL one (hopefully the FL one has a few more miles left in it), I've been looking at more modern equivalents and the improvements that matter are just refinements, rather than new gadgets. Autoboxes are all 6+ speed, which is a vast improvement on the loooonnnnnnggggg ratios in an Omega 4 speed unit. Diesels in particular are more powerful, more drivable and a lot more economical. More refinement on noise reduction.
The new gadgets don't really interest me, but the useful ones like traction control are a bit more intelligent, and most modern execs come with full stability control.
The biggest "new" gadget not available on Omegas that does interest me is the ability to plug in a gayDevice for tunes, everything now has an aux in, many have specific iPod/MP3 interfaces.