[Windows Phone 8 General] The Janitor Mop:
Higher MP count camera: I already pointed out that more MP can actually decrease image quality for cameras with small sensors, and camera phones represent virtually the smallest sensor sizes in the camera world. Do some research and you will find out that the extra MP in phone cameras like the Titan II only result in extra noise in the image. Again, the 920 has a slightly larger sensor size than the next biggest sensor sizes in other top phones (GS3, iPhone 4S, One X), and it makes sense to slightly increase MP count from 8-8.7 MP. Image quality in the end is all that matters, and if 8.7 MP truly is the sweet spot for this camera, then by all means don't give us more MP Nokia.

More RAM: I hardly see this as a point to complain about because the majority of new phones even today still just have 1 MB RAM. Only the very newest Android phones are starting to be released with 2 GB RAM. So, the 920 is doubling the RAM WP devices have (from 512 MB to 1 GB) just like the newest Android phones are doubling from 1 GB to 2 GB. Furthermore, a lot of people are arguing quite convincingly that it's virtually impossible to tell if 2 GB RAM is actually having a noticeable impact on performance of their devices. 1 GB really is sufficient RAM even for an Android. And what's sufficient for an Android phone is overkill for a WP8 device, as much as I hate to admit that as an Android guy.

Quad-core: there are several reasons it's pointless as of right now to hope for quad-core in a WP8 device. First is the fact that very few devices, even Androids, are releasing with quad-cores. Second is the fact that the devices that are being released with quad-cores have quad-cores that aren't worth your time, such as Tegra 3 and Exynos 4412. They're both last gen Cortex-A9 processors. The only quad-core on the near horizon worth your time is the S4 Pro with Adreno 320. I'll say it again: if you really want a quad-core device, the processor you should be waiting for is the S4 Pro. And it's unreasonable to expect it right now because the ONLY phone that has been announced with it so far has been the LG Optimus G. AND on top of that the S4 Pro is expected to be in very limited supply. So it's unreasonable to expect S4 Pro on ANY device released in the next few months (save for the LG, who probably pulled more string than a puppeteer to get them), and EVEN MORE unreasonable to expect it on a WP8 device on which it would be total overkill. If you expect Nokia to give you S4 Pro on the 920 they'll say fine, you can twiddle your thumbs as the release gets pushed back to somewhere in 2013.

Edit: there's something else on top of everything else I just said. I don't know much about WP, but it's entirely possible that WP8 is specifically optimized for dual-core processors. Android's multi-core support is designed to work well with both dual-cores and quad-cores (and theoretically what's beyond), but with MS's tighter grip on the standards for hardware being produced for WP, it is definitely possible that they designed WP8 to be a beast specifically with dual-cores. There's the S4 right now, and there will soon be Cortex-A15 dual-cores coming out in the Exynos and OMAP lines, so if MS did design for dual-core the manufacturers will have a nice selection of next gen dual-cores to work with.