Umm... That's nothing like shoot, shoot, shoot; grenade, grenade, grenade...
I get your point, but once a basic character can swing something and hit someone decently, then another one can be modified to give 2 anims, etc. So a peasant, for example, can only poke with a stick. A posh guy can swing a stick or a sword diagonally from the head down. A Samurai slices differently.
Also, just like the shoot, shoot, grenade, grenade thing, the fact that some poke, some chuck rocks, some swing sticks or swords, throw clay-ball bombs or smoke bombs, will give it just as much gameplay fun as OFP has. Perhaps more. Oh, and archers - I forgot the archers. You could also have anims for peasants bowing and scraping if you hit them, anims to make people kneel to a Samurai or Feudal Lord - great for cutscenes.
For example: You can use triggers and such to walk into a village. If you have your weapon drawn then peasants flee, posh land-owners glare and possibly attack, Samurai go in like there's no tomorrow (which there wasn't in their way of thinking).
I think the enhancements to gameplay would be tremendous.
Edit:
In fact, the same hack, hack looks crap because that's all that's been done so far. Make one good one, and others will alter it to give new anims and variety. Just look at how many people jump in and enhance existing stuff, even things like some grass or a box. I know the figures are more complex, but people are doing all sorts of cool stuff.
The OFP community obviously possesses a huge amount of skill and enthusiasm, and I'd like to see some of it create what I know will be amazing once it gets going.