With the original M&B being a 7/10, Warband being 8.5/10, Fire and Sword has dropped down to 6.5/10. Far too many good things were cut, with little else added to replace it. However, the core of the gameplay is still there, and the game still is fun - just not as fun as Warband.
I probably wouldn't purchase F&S if I knew then when I know now, but I'm not disgruntled or upset with my purchase either. I am going to play it, and I am enjoying parts of it, but next time a M&B game is released I will do a lot more research instead of simply preordering it and expecting it to be great, as I did with F&S.