Yesterday I asked you for your wishes for ExpressionEngine in 2012. The feedback is mixed (keep it coming!) but there was more than one mention of easier upgrades and a one-click update process (like WordPress).
As is usually the case with software, I’m sure this is easier said than done but I agree that it needs to be done. I sincerely hope that this will be on the radar for the EllisLab development in the coming year (and hopefully before EE3).