Yes, in fact FIFA always makes reviews throughout the 4 years of construction of the World Cup and makes inspections with experts and they always keep their reports, in fact when things don't add up they are capable of taking away the venues, as happened in some sub 17 tournaments, now for the World Cup the demanding standards are higher, so the World Cup has to guarantee the highest quality in the stadiums and in the main soccer regulations, these things will always exist, I imagine that in every World Cup new things come up, and hosts have to meet those demands.
The quality of the stadiums and any other facilities should be obviously higher than the last world cup we saw because four years passed and we can have better technologies for stadiums and this can definitely help the hosts, while in some countries they don't have a good financial system like Qatar does, they can't provide good quality facilities if they don't already have enough facilities.
while Canada has never hosted a world cup, so Canada has to learn from other countries that have hosted it (host the world cup) about how the quality of the stadium
I am curious how they are going to sort out the groups and whether every team could be subject to mass traveling. But either way this is going to be a mega event! 
