The basics of WFRP combat are quite simple as stated. But it is a mistake to assume that there are no tactics involved.
Things like ganging up on a foe, when to All Out Attack or not, what you spend Fortune Points on, whether you carry a shield or use a two-handed weapon, these sorts of things have a HUGE impact on the outcome of a battle. I'd urge any GM or player to study the implications of these rules.
YES. Absolutely.
Of particular note (IMO) are the Aim actions and the All-Out Attack action. If you're running by the book, there are few reasons not to use Aim if you have a shield or a second weapon. (You get a free Parry and only get 1/round this way, so you don't need to save an action for a Parry.) So, in a sense, using a second weapon or a shield can translate to a +10% to attack in most - but not all - circumstances.
All-Out Attack is particularly awesome for a DM. Combat - especially at early stages - can
drag if your players' dice aren't on fire. Not only is there a low chance of hitting, but there's a sizable chance of doing insignificant damage even if you do hit. All-Out Attack helps your monsters hit more often, and means you don't need to hold back a pesky parry you might forget about anyway. What's more, it's ideal for PCs who are ganging up on a single foe, because a single enemy can't attack all of them, right?
Speaking of - ganging up on a target is
huge. When running WFRP, instead of using a battle map, I more or less keep track of it the same way I do in AD&D. I assume that melee combatants are in one or more scrums, and everyone else is somewhere else. If you can divide up the scrum so that you outnumber your foes, you get huge bonuses to-hit, +10%, +20%, or more. So you could try and peel off a single mutant, gang up on them to dispatch them, and then work your way onto the rest of them. It's really all about numbers.
Finally, missile weapons in WFRP are completely insane. You can't parry them, so there's often no defense against them. About the only issue is that you're dead meat if you end up in melee combat - you can't do the 5' step and attack like you can in 3e. Still, if you can hang back, you can demolish enemies with a high Ballistics Skill and a decent weapon.
-O