I posted something similar earlier. Remember though, they predicted that they would get rid of Priebus some time ago and he didn't. The media also had no clue whatsoever about Trump firing Comey, so their sources aren't too accurate. This was also posted in the NY Post.
If he gets rid of too many people, he risks alienating his supporters. Especially in regards to Spicer who has been attacked mercilessly by SNL. Why let some two bit, rag tag comedy show force changes to your team?
As was stated, I can't believe anything until it is actually done, but I think it's extremely risky for him to do this, it will give the appearance they others are running the WH and not Trump. Furthermore, as I've said from day one, Trump will only remain president and prevent a progressive from the Left winning the WH if he enacts his campaign promises.
Without question, the Democrats are banking on him being stymied and doing just as this article suggests, they expect that he will stop fighting and instead give in to the interests of others from the left. Its their gameplan. If he starts firing those who want to enact his campaign promises, it will be the left in the next election with the motto "Vote for us and REALLY Make America Great Again". They could even copy his campaign promises word for word and tell the public, "but we will really do what we say".
China, Mexico, Canada. Economic abusers of America in that order. If Trump doesnt deal with it the next government will.