Well, how about each of the Pig-4 teams to allow a test series with Pakistan? Believe me, while Pakistan is not in the Pig 4, but the test matches like Australia vs Pakistan, England vs Pakistan and even India vs Pakistan (if it can ever happen) can create more hype and interest than the pig-4 playing with themselves only on a test match level.
I do not say that Pakistan will win these test series but it will create more interest and entertainment among cricket viewers worldwide.
Anyways, I will also suggest having more test matches between the weaker teams too to keep the matches competitive and also to keep the test match format alive.
I remember, Pakistani International test cricket team was an outclass at the time of Misba ul Haq. Misba ul Haq is a legend and in his captaincy Pakistani International test cricket team made many records. But now Pakistani International test cricket team is not enough strong to beat India , Australia , South Africa and England. Pakistani selectors are picking the players on references and they are not looking for talent .
A captain is of immense importance in managing a team properly. The players who are captaining instead of Babar Azam may not be able to perform their duties properly and also the batsmen and bowlers who are there may not be able to play with responsibility due to which the performance is like this. But the Pakistan team should be given some time and they will recover.