I'm a complete newbie to AoS (not yet played a game, just crammed the rules and bought a load of models!), and I'm struggling with a basic concept...
If one of my unit attacks an enemy unit, and I get to allocate (for example) 5 wounds, I MUST allocate them all to the same enemy model, until that model is slain. Ok, not how it works in real warfare of course, but I get the idea: AoS wants units to have as many troops for as long as possible in a unit, for longevity's sake. Also you don't want wound counters for every model on the battlefield; that would get messy. Fine.
But then you have the coherency issue. Unless I've misinterpreted the rules, if I kill, say, the central model in an enemy line, such that when that model is removed the unit loses coherency, the opposing player must remove further models from play until the unit regains coherency! This seems to undermine or undo the logic of the 'forced wound allocation' model above. Does AoS want models on the battlefield or not?? I find it hard to get my head round the contextual reason why troops would suddenly vanish from the battlefield if a fellow soldier was slain, especially if they're unhurt and still within a stone's throw of the remaining members of the unit.
Wouldn't an easy fix be for the 'uncoherent' unit to be forced to regroup at the start of its next movement phase, to the penalty of some of its movement in that phase?