Indeed the Wedge was used quite a bit by the Romans, especially if you subscribe to the notion that Seutonius won the battle of Watling street through an entire army of wedge formations xD (I personally am not so sure about this). Also how are units retaining their rigidity? Once combat ensues they lose their rigidity and become loose.
A few other notes:
I will not re introduce formation attack as it doesnt work properly and really ruins the feeling of battles for me, I only use it for hoplite units because I think its really necessary and mostly works for those distinct units. If formation attack worked like I wanted it to I would most definitely be fine using it more often.
Charges weren't actually as devastating as you'd think. They had more of a morale and weight impact than an actual casualty impact. Casualties were more often the cause of the routing stage or when units became too tired to resist a sustained attack (like the system I have developed). Also don't forget the units shown here have some of the most rigid and slow charges in the games, you should see the barbarian charges... they're terrifying and quite awesome to behold!
Pila are released before a charge, I just didnt show that very well in the video. I'll be doing an animation show case in a few weeks from now.
With the fighting animations only certain animations show up when fighting certain types of units. So fighting wild barbarians will see large slashing attacks against romans who are trying to hold them off with their shield. Animations will also be sorted for formed units who use faster, more confined animations and also splitting sword units into long sword units, who use more slashing attacks and short sword units who do more stabbing.