The Falcons have not had an easy time sorting out their options on the offensive line. Sources say Atlanta is considering moving Justin Blalock from left guard to right tackle but will likely be unable to settle that situation until coaches see what last year’s starter at right tackle, Todd Weiner, is able to do after he recovers from major knee surgery. “That’s probably the process that we’re still dealing with more than any other position,” new Falcons offensive coordinator Mike Mularkey recently told PFW. “Some of that is because of injuries, some of that is because of finding out how guys can handle certain positions, so we’re still … it’s trial and error.”
I don`t think so, Blalock struggled at LG.
What makes anyone think he can handle RT?
If Weiner is not fit to play?
Go with Tyson Clabo.

What the easier position, RT?

Is RT easier than LT? Generally, though w/ Vick it was the blindside.

Is RT easier than LG? Probably not. The LG has a lot less movement that they are responsible for. Although there are pulls on running plays and screen where the LG wil need to move, gnerally they don't need the nimbleness of a tackle that has to quickly backpedal to keep up with ends and LBs racing around the corners.

If I had to guess, I'd say that the new Oline coach is just seeing what he has before settling on a definite alignment. Or, If Weiner misses extended playing time and Clabo has to start, Clabo will need a backup just in case and the team may still be up in the air about what their 2nd or 3rd best groupings may be for the line.