This leveling process is way too slow and linear for me to want to do it again. I'm not 'adventuring', I'm walking down a hallway lined with Blizzard's idea of fun tied to a few ball and chains titled 'cooking', 'reputation', 'gear', 'no heirlooms', and 'no flying'. I extremely dislike it when it comes to my alts.
I highly doubt they'd get rid of rep tabards just to bring back a new form of rep tabards. This is Blizzard we're talking about so I'm not 100% sure but that would be kind of stupid.