Charge
This might have just been the guy taking us through having a melted brain after 3 days, but apparently you roll for the charge and then declare targets after you know the results.
The first model has to end base to base with the charged unit. Each model you move in has to end in base to base if it can. Models in base to base contact cannot pile in. Models that are base to base contact can fight, and also models in the same squad that are in base to base contact with them.
Battle shock
I like this! If what they say is to be believed. It seems like a sensible change o charges in 9th and a return to 4th/5th edition. If it really is base to base to (your)base can fight you don't need to try and fit your tape measure beneath terain to measure if they are within 2 inches to fight.
Yes, I agree that guard look fun! The 2Cp strategem to bring back a destroyed squd as "reinforments"! is really cool and thematic.
I'd also briefly like to note that while lethality is down across the board for infantry which is great. I find the faction focus boss units (abaddon, G-man, screamer killer, skarbrand e.t.c ) have gotten more lethal.
All seem to follow the pattern of lots of attacks, twos to hit, threes to wound, AP lots, target fails (say 3) saves, (takes 12-19 wounds) and dies.
Yes, I understand that the full gamut of rules and possible mitigating factors have not yet been released other than G-man fighting back with only in death does duty end and maybe coming back to life after dying. HOWEVER, I find it interesting because....
They feel like they have taken the role of the queen in chess. It can take out anything on the board (except high toughness vechiles) but be taken out by a charge from another queen. So it seems like it might become a game of how do you support your "queen" unit and when to commit it. Anyway I thought it was kinda cool.
*unless this is how things were in 9th already and I don't know any better
edit: combat patrols do sound really cool and sound great for a quick pick up game. I am indeed a hobby butterfly and have several already