no. not at all. i think she wanted the characters to mature naturally which is why they didn't "like" each other until they were 16. because hermione was dorky and ron always tried to play it cool, it took a while for them to develop a relationship.
I don't think so. If she was so set on them being together and "rushing" things, they would have gotten together in the first two books sometime. But no, they waited until the very last.
yes and no, the idea started in the "goblet of fire" when ron was jealous of her going out with viktor krum so it wasn't to far into the story but it could have progressed a little quicker.