As you say, what we see now is very different from the Church before it was burnt, repaired and much later totally rebuilt. A few pictures of local churches, less influenced by warfare does show the double pitched spire effect, as does Adkin's drawing (often wonder where he found that?)
Modellers agree the spire was different. Artists seem less sure, you may notice. Apologies that I am not acknowledging the sources of these pictures, but they are available on line and I never did record that!
(Now found the source, all recent discussion here and worth exploring;
It is also fun to just visit every village in the area, either on foot or sitting at your PC and using Google Earth or some such, then drop the little yellow man to see the local church. Try Lasne, or Genappe, or Ways, or Ohain etc etc. They all share that same style
TMP link
What I have seen of these models looks very impressive, even if I might want to alter slightly, personally.