Actually you got your lineage a bit off...
Falcon evolved into the Pinto, Pinto into the Escort, the Escort became the focus.
Maverick evolved into the fairmont/grenada. The line then split in 82 with the fairmont becoming the midsized LTD (rougbly taking the msrket segment of the 77-79 LTD II which evolved into the 80-82 Tbird,) and the grenada roughly being replaced by the tempo/topaz.
The midsized LTD would evolve into the taurus in 86, The tempo/topaz evolved into the contour/mystique. Both of which went extinct.
The FWD counterparts had 0 DNA of their predicessors besides taking its place in the market segment.