The basic principle of the Coriolis Effect is simple. There is some force that imparts minor rotation to objects on the Earth's surface, that's all; it would be logical to conclude that this force is the same, or at least connected to, the one that causes the stars and Sun to rotate in the sky. There is no significant argument there, independent of whatever model you are talking about.
The only reason the Coriolis Effect is brought up at all is because it acts differently depending on what side of the equator you are. This is not nearly as dramatic as some REers claim, you cannot simply take a few steps either side of the equator and have water drain from a bowl in opposite directions like a few tourist traps would have you believe, but there is still an effect, the most reliable indication of which is the direction that hurricanes and cyclones move.
So all FET needs in response to this is to explain what it is that makes the equator special. To again tie to other similar rotational motion, this argument may as well be the same as the star trail argument. Why does the direction change at the equator?
True, it is hard to see how conventional, uniplanar FET would deal with this. Good thing that's not the only option we have.