Using card for the sake of using cards doesn't make any sense,
So is using dice just for the sake of using dice. If you are going to use cards or dice, have a specific reason for choosing that one - don't just default to dice just because you want to use dice. That doesn't make sense, either.
You missed the part where I said I loved Starcraft combat system. I was very excited at first, as I hoped it would be similar, but lately, I find it looking more like Warrior Knights which no one enjoyed in my group.
I know card based combat can be done well, as it was the case in Game of Thrones or Starcraft. It does make sense to use dice when the cards seem to be only there to mimick dice (granted, it is not quite sure, as the combat system could be deeper). Withdrawing results that have already been rolled from the pool doesn't seem to make any sense there.
If we were to roll a 13 sided dice and then a 4 sided one, to get a result between 1 and 52, rerolling the numbers that have already been rolled, and comparing them to a chart to get a result ranging from 2 to Ace and a color, I would advocate drawing a card.
Considering we don't know the details of how combat works as a whole, this statement may or may not have any merit in terms of being a valid point Once we have the rules, then we can begin making contextually valid statements as to what is or isn't "better".
Once the rules are printed, it would be way too late for it to be relevant (although it probably already is).
I don't understand why they haven't gone for a Starcraft like combat system when it was much better than the one used in Warrior Knights.
All we have is a TINY bit of info on the Runewars combat system. Until we know more, your complaints don't have much foundation other than it sounds like you'd rather have dice just for the sake of having dice.
As I said, from the limited bits of info we've had, it seems to be similar to warrior knights, which I regret having bought, so It is a solid foundation for concern to me... If the cards are just drawn without any decision taking place (we don't know that yet, though, we might be able to chose from several cards, but the preview seemd to imply the reverse), I'd rather just have dice indeed, it is faster, and doesn't favor the same kind of counting metagame.
To be more specific, what I don't like is not being able to get a given result(or being less likely to) because the needed cards have already been drawn for unrelated actions (or the other way around, having a good chance to get this needed special effect result, because the other result have already been used).