Why would their reserves and cards be lost? Isn't a player still responsible for eliminating them... Should that player not keep the units in reserve for next turn or have the cards added to their stack for a successful elimination? I think that at the end of the turn the player should be eliminated and the responsible player should get the elimination rewards, but not be able to use them for the next turn. I think it makes sense that if you eliminate a player via artillery, you would have to wait until the next turn to acquire the spoils, but the spoils should still go somewhere, not just disappear, no?

You can argue it both ways I suppose - yes they are responsible for the elimination, but to use a military analogy it's like pounding an enemy army into submission via artillery but not being there to execute the coup de grace by capturing the enemy general.

Could also lead to complications where the eliminating player ends up with too many cards at the start of their turn than are permitted by the rules.

I am for the way it has been implemented. If you eliminate a players units but fail to take their territories, they die due to attrition (revert to neutral at the end of turn), not to your attack.

So theoretically you could win the game and not be credited with an elimination?

Yes that's right.

That doesn't make sense, you are the eliminator. If you beat them with artillery, and don't kill the general, you take them down to 1 unit... if you riddle them with artillery and take the units down to absolutely 0 units, you still eliminate the enemy. If there's an elimination, there is a responsible player, and that player deserves the reward in my opinion, even if they don't get it until next turn.

In a game sense, I like the idea of a delayed elimination due to artillery vs attack borders. When territories turn to neutral immediately, the player is eliminated immediately, correct?