Indeed. The first professors to go were the ones most liberal. Also, it is not quite like the seminary "fired" the professors. More like they left (pun intended).
I have some of the writings from some of the profs who left SBTS during that time. Saying that they were liberal would be an understatement akin to saying that the devil has some bad days. One line that sticks from one of their articles, "God, he, she, it..." That writer went on to disavow the God of the Bible in no uncertain terms in favor of an unknowable wholly other god (gods, etc.) that left no certain revelation. Other writings were as bad or worse, and I can give direct quotes if I dig out their booklets and journal articles from my library.
Professors at SBTS currently have a wide range of views. No one is expected to "toe the mark" (whatever that is) save for signing, in good faith, the Abstract of Principles. I've sat under profs who were 5 point strict Calvinists, others who were 4 point (sort of) and the points seemed to shift from time to time, while others still (as in my case) disavowed the TULIP all together. (I was going to say "Calvin's TULIP" but that would be mis-speaking. Calvin did not give us TULIP. His followers did, and they missed some of Calvin's points. Same goes for the Arminian position, BTW. Again, followers, and they missed some stuff.)
I prefer to hold a biblical position, which must incorporate some aspect of both free will and God's sovereignty. Like the Trinity and other difficult to grasp issues with God (antinomy) the issues in Reformed or Arminian theology are difficult, but revealed. Any sense that they cannot be reconciled is our own issue, not God's.