What Does Brewers Lineup Look Like With Walker?

As you know, Brewers acquired Neil Walker over the weekend to shore up the second base position. Jonathan Villar and Eric Sogard were not getting the job done leading to their dismissal, and Craig Counsell using Walker to play second. Now, he debuted at third base to give Travis Shaw a day off after he banged up his foot on a foul ball. People see Walker playing three of the four positions in the The infield if possible to give guys’ rest. The question is how does he fit in an already packed lineup.
Bats Second -> The lineup would look like Santana-Walker-Braun-Shaw-Thames-Pina-Arcia-Broxton: It’s extremely hard to wonder what you do with the leadoff spot. In this situation, we have two lefties at the same time. Maybe you let Thames lead off even though that didn’t go well to avoid a straight lefty-lefty with Walker having the ability to switch hit.
Bats Six -> Lineup goes Arcia-Thames-Braun-Shaw-Santana-Walker-Pina-Broxton: This would move Orlando Arica all the way up to the lead off position while keeping everything the same. It’s unknown if Arcia can hit leadoff, but it’s worth a shot likely.
I feel like these are the two lineups I can see happening. I guess you could make a case that he could lead off the game, but Walker has a grand total of 10 at-bats from the leadoff spot making Arcia or one of the power bats likely the answer.
CHarlie.