I'm beginning to think that Android has a real fragmentation problem.
I don't know if you're deliberately taking the piss... you do know people have been saying this for years?
Still, no matter how much it is said it remains to be proved that this is an actual problem rather than an imagined one.
It would be best if Google focuses on offering a top-notch Android experience and - at the same time - alow for Geeks to fiddle with their devices, root them and such.
If Google implements a fixed release cylce and does end-user marketing whilst catering to the geek crows (opinion leaders) at the same time, then they can leapfrog the vendors messing with their own versions of android and allow for more seamless updates. In fact, I think they should offer customisation services for every vendor who want's their own visuals in the launcher and specifically support vendors who stick as close as possible to the mint Android experience.
So this is pretty much what they do do. That freedom to allow 'geeks' to fiddle with their devices is the same freedom the vendors use to customise (and occasionally improve) the experience.
Whatever they do, they have to put some effort into curbing fragmentation, because that's the number 1 thing that bugs Androids attractiveness.
(a) nothing you have suggested helps, you lose the ability to amend the system then you lose the freedom of the system.
(b) perhaps for you, but I doubt most people buying phones are that bothered about upgrades. The missteps that Apple and Google have made in upgrades recently have actually made people not want upgrades. ie, I like the device I bought, please don't change it.
Likewise, if Apple sticks to they minimised choices and manageble line of systems and devices, they'll continue to have the edge in that department and maintain their market, no matter how powerful Google gets in the low- and midrange global markets.
My 2 cents.
The idea that Apple owns the high-end and Android is only mid and low end is hopelessly out-of-date. Perhaps in the US, but the rest of the world Android sits at around 80% share and that is not just mid and low end devices.