But the right/left vote is not shifting that much.
I haven't looked deep into it, but the polling for two-party preferred vote (which should approximate left-right) has been shifting. The Wikipedia summary chart of ALP:LNP has pretty consistently shifted from around 58 : 42 last June, to around 53 : 47 - a large shift. If we naively extrapolate the trend, the two-party preferred vote would be tied in around three or four months.