I think it's worth trying though. If it sees a fall in traffic and posts then for sure it didn't work and should go back. But so far I do like it. For me, it highlighted posts in SuperGT and GT Open a bit more, and I've started a 24H Series thread to see how that goes.
What kind of stats do the mods/admin team have access to? It's been a long time since I used vB and I spent more time breaking things than anything else
Are you able to see weekly traffic? Keep a note of how it was before and how it is after?