It will raise the level of awareness in the country and naturally they will get better. But I don't think it will change their national team much in the near term. It takes generations to change a culture and in sports increase awareness is the first step. More amd more top players will go there because they are using government money to pay these salaries so they are playing with a loaded deck.
National team and domestic league are completely different things with if they want to have improvement in national team they need to work on their system with youth competitions and other related stuff can bring good improvement because its also works.
But this needed good dedication and strong management even they are now changing many things in this country which are positive but it's still going to take time because we can't bring changes in few years as things are going on for centuries new generation is having good motivations, and they are stick about their vision which is good point right now.
When compared to other regions such as America, Africa or Europe, Asia is the largest continent and is divided into 4 regions, namely West Asia, East Asia, Middle East and Southeast Asia. This is a very large and vast region and as you said, it will be very difficult for all regions to unite and form one league to compete like Europe. For example, Southeast Asia has a local competition outside the FIFA calendar, namely the AFF Cup. This makes it difficult for each region to compete with each other except in the Asian Cup or Asian Games.
AFC can bring good changes even this is not easy but if they are able then surely we can have good revolutionary development in this region's soccer because if AFC able to bring all countries on one table and having their one or two events for all countries like UEFA also help them for having their domestic leagues well organized this is surely brought good revenue and other things which are essential for them and this region could be having good potential for soccer.
Because, we have this is second most popular sport in this region after cricket which is having strong base in India, Pakistan and Bangladesh, but they can bring good for all regions specially in West and Central which are already doing good work for the development of this game.