In Safari, there are 2 ways to have your search bar go back to the top of your screen. For the record, it did take a bit of time to get accustomed to the search at the bottom; however, I really like the ability to go to tabs easily.
- on the left of the search bar you will see 2 letter As. Select them and then choose to Show Top Address Bar.
- the second way is to select Settings > Safari > Tabs > choose Single Tab