Upon further inspection and comparisons, I've come up with some interesting observations.
1. Some of the converted players (like Ivanovic, Antonio Valencia, Klose) have shoulder parts sticking out even in static position, not only during animations:
2. Seems like some players who were never officially rescanned by EA actually received nice improvements to their models: L - conversion, R - default
3. At the same time one could see the head size difference between the identical default F14 faces and the converted ones: L - conversion, R - default
Rather close by the most part but as we know FIFA head sizing is not really consistent.
4. Some of the players who have become "legends" since their playing days have had their face scans improved:
While others have become wax dolls (although it's a matter of taste I suppose), personally I'll stick to some of the playing days faces rather than EA Legend versions:
5. Some players have the hair clipping issues as reported before, although nothing major so far
6.
@Re_coded not sure if you saw this already but the F21 converted pack includes the new Robben texture with more hair suddenly: L - F21, R - F19 texture
):