Heaven’s Feel, especially part III, really cemented a common pattern in the Fate series for me:
Start off with an interesting, but understandable, premise
Set things in motion, maybe hint at twists
Go off the rails with things that some would consider “ass-pulls”, but do it with such hyped up animation/soundtrack (nine-lives blade works comes to mind), that it doesn’t matter anymore
Sort of try to wrap it all up, fail
Create another route, prequel, or alternate universe
Heaven’s Feel, especially part III, really cemented a common pattern in the Fate series for me:
Heaven’s Feels greatest strength was it’s insane animation and great soundtrack to compliment it.
The plot was also very edgy and weird which suited the above.
The Saber Alter vs Rider fight is still the best fight animation I’ve ever seen.