1. Well I don't know to arrange them alphabetically. They follow the arrangement I make on my desktop Chrome. If I rearrange it there, the arrangement of the bookmarks in my Tab mimics it. Conversely if you aren't using desktop Chrome, what are you using? Firefox? Opera? It may be easier to just use Firefox for Android or Opera Mobile (not mini) if you are using their PC counterparts.
2. Not exactly sure how much quicker can you get to going to the bookmarks when there's a huge "bookmarks" button at the bottom. But maybe that's for tablets only.