I am sure that most home users are more than satisfied with a dual-core machine. Same goes for organisations. The quad core option was primarily interesting for 'geeky' purposes, such as running it as a server or a secondary/intermediate processing machine, or even setting up a distributed computing cluster. Yeah, those users will suffer, but I would be very surprised if there are many of them.
It's not so much the dropping of quad core that I personally object to, it's the taking away of the serviceability/upgradeability offered by SO-DIMMs and 2x SATA bays.
I'm virtually a dinosaur I know, but I miss the days of a 'box' with easily accessed RAM slots, drive bays, card slots, etc etc. I realise that time isn't coming back, but the mini *was* about as good as it got in that regard.
But my reply to you was actually targeted more at the power consumption and case size comments. I truly believe that <10% of purchasers are swayed by either factor.
P.S. Why is the iMac loathsome? Its seriously the best home use machine, if one wants to stick with Apple.
I guess it is due to the brutally bad heat dissipation.
Firstly, the iMac is certainly the best priced Mac. The price differential between a mini and a 21.5" iMac with marginally better CPU, GPU, and of course display/keyboard/mouse is ridiculously small.
I had the first 24" iMac (late 2006) which had a gorgeous polycarbonate casing, matt screen, externally accessible RAM slots, and relatively easy access to the interior. If it was now available with Haswell innards then I'd be all over it. But... it died because of a well documented GPU solder failure. Not sure that it was 'brutally bad heat dissipation' or more a production line issue.
This left me with a lovely but useless 24" display, which put me off all-in-one designs. The history of the iMac post-2006 – glazing, more pointless skinniness, less user accessibility, more heat-related problems caused by that pointless skinniness, less chance of addressing those problems due to Apple's user lock out, and did I mention the glazing? – has done nothing to encourage me to return to the iMac fold.