I'm not sure a couple of games makes a run, but even if it extends, then I don't think it was only last season. Haven't we had a similar '2nd half of season' dip in goal scoring over a 'few' seasons?
We need consistent goals - as has been said by most for a while now. The two main strikers just aren't performing - so the reliance falls too heavily now on Bales shoulders. Luckily last season, we still had VdV, Bale and Ade firing. But we still have nine games and it could be that Daffy or Ade find their shooting boots again and rack up another half dozen goals plus each.
I would bemoan the number of games we're playing - but that would be a bit of a nonsense as we all want the team to get Europe - which means that we obviously have to play more. The number of games is just a product of our success over the past few seasons - and is something the top clubs have been dealing with season-in, season-out. At least Chelsea will be playing the same number of games in the run in (so far that is). Wenger, from the perspective of the EPL, must be quite happy that they're out of Europe.