Less than the stats of the best attack; remember that the defense has all those little city defense benefits, and the AI cannot remember what button to push to make the artillery work (honestly, this is the ONLY game I have EVER heard of where it is ok for the AI to not understand how to use parts of the game. RIDICULOUS!).
I have been saying the same thing about infantry infrequently (in that a change from the original was... ill concieved ;p), but it seems that the prevailing blasts of hot air ;p are in favor of it. Sheer volume stands with an infantry change, and thats how cheer-ocracies work! Speaking of which... can we add a government called cheerocracy? It could super suck, it would just be entertaining to someone of my feeble intellect ;p
As to HTs and ACs, why not have the darn thing in there. Its already there, it serves some kind of purpose... maybe... and it looks cute ;p
Can anyone think of a compelling reason to get rid of it?
Oh, and are the Cavalry units upgrading to some kind of mechanized infantry? If they dont, they should! Go check out unit designations; there are still Cavalry units around in the modern world, but they are usually equipped with helis and other hyper mobile bits of equipment.
From what I know, the current military definition of cavalry is that it is a tactic, not a a dude on a horse. It is the idea of a hyper mobile (strike) unit that can attack rapidly without the encumbrance of heavy weaponry. Usually they do their best work on the flanks, where they can tear into a force already engaged with a primary unit, like a general infantry group or a tank corps.
***IDEA***
Also, thought of a way to implement invisible units. Make the guerrilla line invisible, but make it so that all units can detect invisible. That way these guerilla units can run around causing havoc, but do not require a special unit to hunt them (something which never made sense to me in other games).
This means that they can sneak around, but cannot attack any cities without being spotted. It also increases the value of patrolling the countryside (something France, and later the US, was forced to do in Vietnam).
So surprise attacks are possible, but the units capable of executing them are better suited to the fifth column activites for which they were designed (cutting rails and killing villagers and generally making PITA of themselves)