Living in Maidstone (where 377/5s are running), a refurbishment couldn't come soon enough. The paint job on the outside got done but the interior is still the old self; old worn seat patterns and a generally bad look, especially compared to the 375s after their refurbishment, which I think was very good (they make limited appearances on the MDE line, mainly in early peak).
I'm guessing their refurbishment is waiting the new franchise in December this year, which may even see them leave the franchise depending on the incomer's ambitions.