Its a hell of a blow. You could tell Button when being interviewed about it, he so wanted to say (im sure but couldn't for obvious reasons) that Honda need to sort their **** out.
The car being in perfect condition for racing up front but the "we wil get there" sort of comments are clearly (to my mind anyway) his internal thoughts on how poor Honda have proved to be thus far. IM sure if there was a no holds bar attitude towards interviews and drivers could actually speak their minds he would have berated Honda in some fashion for not doing a great job whilst having all of 2014 unhindered to develop the engine.