When you add the magnetic pole changes to the Milankovitch Cycles, to the sun's output changing, to the sunspot cycles, and toss in cosmic rays, you get one complicated model. I hope they took all this in.
Maybe they can also explain the warming on Mars, Pluto and Triton, one of Neptunes moons.
I guess climate modeling isn't as simple as it seems, and it will likely be along long time before we have the capability or the understanding to make a real model.
Correlation does not equal causation, one of the first mistakes junior scientists make.
Indeed, the higher heats on other planets would be indicative of higher solar output.
But then again, how is it, precisely, that we measure higher temperatures from those planets? We don't have sensors on Pluto. Do we, rather, measure the reflected energy from them that we detect here? Our weakening magnetic field lets in more of the sun's energy. It also lets in more of the reflected energy from other planets.
The sensors are here, not there.