1. I don't think we'll be getting any more visualization per say - but we do think a "results of attack" mouseover tooltip makes sense (been on the todo list for months). So if my 8 physical and 2 fire attack agent is doing a basic attack, if I mouse over a 1 elemental and 3 physical defense mage it will show that I would do if (math...) 6 damage. This should make it easier to make snap decisions.
2. Oh well - what a great question. There's a LOT you can do with dead heroes - and even living heroes you can get a token of them to use for rituals. However, you have to have the appropriate TRAIT for that - a lot of our game pivots around checking "what trait or skill level does this person have" and then allowing for results. A mindless barbarian would not be able to collect tokens from a hero, nor would he know what to do with a body (except mutilate it, and yes that is in the game), but a necromancer has... many FUN uses for corpses. I don't want to spoil any but... ONE OF THEM involves reanimating the corpse and having it deliver a message to whoever sent the hero after you. It really messes with morale, as you might expect.
3. It's a mouseover at this point, not necessarily a click though it amounts to the same. I understand it can be a bit much, but I tried to emphasize in the video that combat is RARE - so it is a decision for you to wade in to these combats or not. We may be able to put that information on the token on the map and lose the mouseover whole portrait, but no promises on that right now.
Glad you liked the video.