I disagree, we keep having good performances & moments where you think "ah this should give us a boost". E.g. recently we just won the League Cup & had a great performance away at Kiev - few days later we get hammered by a Liverpool reserve team.
Teams won't fear us this season, we consistently fail (spectacularly usually) to beat anyone in the top half, beating Villa 5-0 doesn't change that. We just need the points, we're not suddenly going to turn a corner this late into the season & go on a 10 match winning run - we just need to scrape our way to top 4 & get it sorted next season.
A negative view perhaps, but a far more realistic one than expecting us to turn a corner if we give Villa a beating I'm afraid.
With the possible exception of Kiev I can't remember a great performance. The cup win was certainly not a great performance.
We not only need to win but win convincingly. Something that we've not done in the premier league for some time.
Look at Leicester they are playing with utter confidence, something we have failed to do for some time.