Calvary, high level deaths in vain

[Shadowwalker]

If I'm not completely confused you can order the whole reinforcement army to stay back, advance to archery range only or to attack though.
So you can at least prevent your reinforcing general(s) from dying due to AI madness. :)

I do know that general units are now on foot.

I guess you misunderstood the screenshots of the generals preview. :)
The general units that were mounted in EB I will be mounted in EB II as well. (And there were not many EB I general units that were not cavalry units - infact I can think of only Casse (chariots), Koinon Hellenon (foot) and Sab'yn (foot) at the moment.)

The reason you didn't see mounted carthaginian or roman generals in the preview is just the fact (I guess at least) that the horse models weren't finished at the time the preview was produced.