Having owned a number of hatchbacks, English and foreign, I would say that it is the norm to have the strut push up to wihtin and inch or two, then need a helping hand to make the last little bit. Also, as I said before, they do seem to suffer from the cold.
Glad we bought Dobbin with doors!!
I've also owned a number of hatchbacks - but this is the first I've ever owned where the struts struggle in the winter, and I don't think modern winters are anywhere near as harsh as 15 or 20 years ago.
I'm left wondering if Fiat are going with the cheapest option here & buying in struts which are only just capable of lifting the tailgate - hence their underperformance in the cooler weather?