Yes, 1 and 3 would be fantastic – although switching to electric without at the same time reducing SOVs is IMO very inadequate if you take int account all of the planetary boundaries, not just climate change. 2 is a policy that might stem from the system change, not the actual change. 4 is not based on facts: there are billions of people in the world who are living within planetary boundaries. Can't stress this enough: it's not "humans" that are the problem but the wealthy people that are taking more from nature than nature can regenerate.
A meaningful system change to me is where there is a deliberate and continued reduction in material flows and energy use in the rich countries until they are below planetary boundaries. That can be done if they deliberately start reducing overproduction. That in turn would happen if governments would abandon the goal of aggregate economic growth across all sectors, but instead increase the parts of the economy that produce well-being and scale down the parts that don't. Another system change would be if the rich countries would pay for the catastrophic damage they have inflicted on the countries worst affected by climate change, and then stop taking advantage of poor countries by ending unequal exchange.
Those would be system changes.
I'm not saying nothing except politics is needed – everything would be doubly hard if e.g. solar wouldn't have become so cheap.
But given what is easy in the current world (producing and selling stuff) and what is hard (creating political change), I wish that the most capable and smartest people in the world would work mostly on the hard parts.