Uninspiring (6)
(Other definitions for dreary that I've seen before include "Gloomy, boring" , "Gloomy - dull" , "Dismal, funereal" , "Dull and depressing" , "Cheerless and dull" .)
(Other definitions for soso that I've seen before include "mediocre" , "Indifferent" .)
(Other definitions for meh that I've seen before include "am I bovvered?" , "expression of indifference" , "Not much cop" , "Unexciting (modern slang)" , "Who cares" .)