Virtually that entire stat line is against southpaws; he's done next to nothing against righthanders at the major league level (as you said, both are very short samples) and his minor league numbers vs. righties are nothing to write home about (.256/.320/.652 this year, .263/.317/.761 in 2016)
Hit with power? In 4 minor league seasons, he's hit 28 home runs, and never more than 9 in a season. That may increase as he gets older, but right now, he has shown no power at the major league level. He does appear to have some doubles power.
I just can't see handing the job to a rookie with rather pedestrian minor league numbers in the middle of a pennant race and playoffs. Travis has shown no consistency at the major league level. Maybe against lefties only, but even then, we don't really know what's there.