ofc it wouldn't but i wonder whom you would side with at that point and who trusts you more... the saudis or the qataris
As far as I am aware those 500 or something Pakistani soldiers that are stationed in the GCC are mostly symbolic and often retirees serving as advisers. Case in point Rachel Sharif. I don't think that they have any strict orders from Pakistan in such situations nor will KSA and Qatar ever go to war. The only realistic outcome would be a Saudi Arabian annexation of Qatar if the US (foremost superpower in the world) would give a green light since they host one of their largest military bases abroad in the same Qatar.
Since no regional country, not even UAE, or superpower in the world would like to see a united Arabia led by the hegemon (KSA) and gain extra tremendous wealth in the form of Qatar (gas and oil) and possibly further lead to a final integration of Arabia (Qatar being the first such step), would likely not be allowed and everything would be done to prevent it from occurring.
Similar to what occurred when Saddam invaded Kuwait.
Therefore final integration in the GCC and Arabia (creating an actual federal state) would only be possible through the will of the people in a different system (constitutional monarchies) and when everyone (regime) are working towards the same goal and not being played out or pursuing different goals to extend their family rule a few more decades.
Until then the likes of Kuwait, Bahrain and Qatar will continue to host US military bases that will act as a guarantor of their continuous existence (in their current form) and of continuous Al-Sabah, Al-Thani, Al-Khalifa etc. rule.
There is no logic, in 2018, when there are already 20 + Arab states, for such states to exist. In theory there could be 100 Arab states today but only idiots would make such divisions when we mostly share everything in common. Historically/regionally, KSA for instance could be divided into at least 4-5 nation states. Who would it serve long-term? Not the locals for sure.
An independent Hijaz once again? Well, to stroke my ego it would sound good on paper but in reality it would weaken the future prospects of the locals unless the goal is to imitate small successful nation states but such small successful nation states are mostly located in peaceful (nowadays) regions such as Europe or unlikely success stories such as tiny Singapore (city-state).
Sane Arabs would be calling for further regional integration in the Arab world (case in point the Arab Maghreb Union, the GCC etc.).
Maghreb, Egypt and Sudan and GCC/Arabia + Iraq, Jordan and Sham.
3 or 4 strong blocks should be and most likely will be the future. Everything else is not sustainable if real progress and long-term security and independence is the goal.