This is my point why not to use crow on landing:

1. Require higher AoA and lesser engine thrust to maintain rate of descent
2. It increases rate of descent at lesser AoA
3. Reduces lift and drag of the wings
4. It increase stall speed therefore higher time of recovery
5. Higher chance of error for aborted landings

For me these are the major function of crow

1. To increase rate of descent without gaining too much airspeed (not for final and not recommended)
2. On the ground after touchdown - to eliminate lift while adding drag.

I'm also open for a final report of this subject including technical explanations...