Yes, I think at some point I will add host-specific rules to Quickstyle. I don't know when, though.
Regarding the address bar, it's not possible to make it align left without some kind of egregious hack. At any rate I wouldn't know how. But, you know, even if it were left-aligned at all times, you would still have to click twice to edit the URL, because the first click only focuses the field and highlights the whole contents.
How about using Cmd-L and then the arrow keys to move the insertion point? Is that not easier than clicking very precisely between two characters to place the insertion point? (Assuming, of course, that you have the use of two hands to make pressing Cmd-L easier.)
Chul