Frankly I think a lot of these little changes will come in 8.x. I think they simply had so much going on with the port to the new shared kernel and such that they were not able to spend time on all the little tweaks they may have wanted to. Just like rumor of the notification center and such. I suspect we will see these things get addressed heavily in the next few updates of the 8.x era.
As much as I really don't like making excuses for stuff like this, that is probably a true statement. They did a lot of work getting everything over to that new kernel, improving a few things here and there along the way, but they couldn't get everything. There must have been a lot of internal deliberation on whether to focus on switching to the shared kernel immediately or adding new features and then having to deal with getting the OS (with the additional features) onto the kernel.
I suppose they also wanted to get the "no upgrade path" thing out of the way as soon as they could, before Windows Phone got into the hands of many more people.