a few annotations: This is about hw design. I don't expect every of you to have an EE background, so I will try to explain some facts to you.
Designing and building hardware isn't like the software development you maybe are used to. In software development when your app turns out to segfault under certain conditions, you apply a patch, rebuild, and worst case you deploy an update to all your customers. No matter if you notice that segfault during testing or 6 months after you shipped the product.
For hardware when you find out you created a tiny oopsie in your device, then odds are you maybe have produced and sold bricks worth a million dollar or more.

I came up with this Neo900 idea since there already is a tested and (mostly) working GTA04 which we won't mess with too much to reshape it into N900 housing. And still we need to do thorough lengthy QA tests to make sure we don't sell bricks. For sure we won't go and use a new CPU family or do any similar risky massive design changes.

Last not least the idea been to keep fremantle as OS since it's tested and known to finally work sufficiently bug free (recall early fremantle version like PR1.0, and the funny little bugs we had in it, anybody?). We neither gonna change that for new OS versions that maybe have look and feel of fremantle but a new untested "engine under the hood", nor will we change CPU family which as well would need such "new engine". In the end the major idea behind Neo900 is not about a giant leap ahead in performance but rather about sustainability of what we already have and love so much. If you want cutting edge then you need to go for cutting edge product, I suggest Samsung, Apple, or even maybe Jolla.