I would like to see a few time travel episodes, but think they should wait til season 2 or 3 to do it. They should focus on world building and establishing the characters this season and by then hopefully they'll have a time travel story or two percolating in their heads.
That said, spacial anomalies that mess with time (without traveling into a distant past/future) made for some great episodes-- Parallax, Time Squared, Time & Again, Visionary, Timescape... all fun concepts.