Balance-wise, the way I see it is like this.
There are three noteworthy cards in this 'cheap and common but decent attackers' niche; Battering Ram, Light Infantry, and Goblin Saboteur.
Light Infantry is somewhat restrictive; you don't see all that much Charge out there, all told, and it's a standard attack.
Battering Ram is not restrictive; but it is weaker, as it's just Wall damage.
Goblin Saboteur is the most restrictive; it only applies in relatively rare cases, but it's both cheaper and more potent then the others.
As such, they seem balanced, now that Goblin Saboteur is fixed. Without the fix, you'd be better off with Battering Ram in most cases.