I'm slowly warming to the idea even though for a while I thought a 32 team tournament should be the maximum. We already have quite a few qualifying spots for Europe although a few more wouldn't be a bad thing (increasing Scotland's odds of qualifying from 3,000/1 to 2,000/1) plus it would be good to see more representation from teams from Africa, Asia, North America plus I guess they could give
New Zealand Oceania one guaranteed qualifying spot.
The 3 team group format seems very weird and I'm not sure I like the idea of certain teams only getting to play 2 games before getting knocked out, but then most will qualify for the knockout stages. We might see teams going more for it as they know one win could be enough for qualification and you might get a few surprise teams (a bit like Iceland and Wales in the Euros) going quite a distance.
It's a global competition and if it can be implemented properly then it could add more drama and excitement.