I feel as the simple fact that if you were to add back RNG to astro (which I agree with) is that you can't really have variant damage cards mixed with more utility focused cards.
I think is Obvious that Lord/Lady Cards should become Ranged/Melee damage buff cards, while Draw should become utility cards, having a way to spread utility on a 90s-120s cooldown is also something that I think is needed, to make astros utility cards feel impactful, right now they're literally just "put on the tank and forget cards" if you even need to use them (lol you really don't 90% of the time)
I also don't think haste works in the current design of the game, maybe in a less strict system it can work but right now I'm pretty sure haste buffs can mess with rotations and burst windows, though haste buffs are likely the buffs you actually feel, so it would be nice if it can work..