I would love a bit more variation in the infantry animations, especially movement animations. I think 2 or 3 walk/run animations would be a good mix and not too much more. I don't know much about the engine or coding in general, but we already have multiple death animations, so it must be possible in some way?
One thing I would really like is for a lot of the reload animations to be 'fixed'. A lot of them seem to be buggy, with clips/magazines floating in the air, and some weapons like the m1 carbine reload via a clip but animate like it's a stripper clip, which looks very odd. It's been this way since Normandy, and 3 titles later in Blitzkrieg it's still very much the same. A minor detail to some, but when I zoom in to the action it is certainly jarring to see, considering the rest of the detail put into it!
In short, yeah, if it was priced well I'd happily pay for more variation in animations, as well as better reload animations.