Anyone Use MFW in high school? Thoughts on slowing down?

I purchased My Father’s World High School World History, after having purchased Alveary, after already having SCM History Guides planned.  I had a moment, or a few months as the case may be, of weakness and panic.  I am really kicking myself for all of the money wasted. So here I am 8 weeks or so into my year and I am not real happy with the pace of MFW.  I generally like the Bible and church history portion, but I feel like my tenth grader is zooming through history at a whirlwind pace.  No mere mortal could learn any history this fast.  And there is no way I can have discussions with her because it is too fast for me.  I love to read, but when I read so many facts so quickly I just cannot digest a thing.  I am considering slowing her way down and having her move at the same pace as my 7th grader.  He and I are using Matthew – Acts and Ancient Rome and then hopefully get into the Middle Ages.  My 10th grader will still need American History, Govt and Econ after this year.   I am thinking of bringing them back together for history studies next year, although I do really like My Father’s World for their Worldview and Apologetic resources.  Wondering if anyone has ever tried to do MFW high school alongside an SCM history guide.  Is it possible?  Will I go nuts?  I could just ignore the history on the lesson plans and let her do everything else.  Of course the literature/writing assignments would be all wonky.  One of the reasons I purchased it was for the ease of grading, which would go out the window if I stopped using it the way it was intended.  I guess I am babbling.  If anyone has used MFW High School please give me some thoughts.  Do I just let her whiz through because college will be a whirlwind of information you cannot absorb so might as well start learning to skim now.  In a perfect world I would sit on the couch with my kids and read and talk and talk and read.  Curse those graduation requirements.

Thanks in advance for any input.

Crystal