Before, Qatar isn't on the same level as some of the MENA teams in the region. If not for the host right, they wouldn't even pass against other strong teams like Iran, Iraq and Saudi Arabia. Qatar recently got good only because of the massive preparation for this World Cup. They got a lot of new players under their national team, buying and transferring left and right just for the stake to put up a good face as a host. I'm damn sure after this World Cup is over, Qatar will fall back to its place, behind stronger teams in MENA. Money can only buy them some temporary victories before and a bit after this World Cup.
Here I agree about this all Qatar is surely having good quality, and they are participating in this world cup just because of host but keep one thing remember right now they are spending good amount on their domestic set up, and they have services of many world-class coaches and players which is surely improving quality and having good soccer structure which is going to help them in future for having better quality and skilled players which are going to help them for having better results.
Few weeks back there was an offer for Ronaldo to join Qatar club surely this was one of the biggest offer, but he refused, and another big point Xavi was also coach in Qatar club before joining Barcelona, so they are hiring top quality players and coaches for better development, and they have enough money for doing things like these which is surely a big positive point for them soccer in Qatar even after this world cup.