I disagree with your point profusely. There was a huge tiff about deferred armies and how people who miss turns should not use it strategically to better the game. The same should apply for everybody else: You shouldn't be able to manipulate somebody else's missed turn to your strategic benefit., Or it becomes a double standard.
It will happen regardless, just like missing turns happens regardless, so we can't get rid of rewards entirely, but we should still limit them as much as possible.
Pooh pooh to your calling me a party pooper
I should say that I think there should be some kind of stronger punishment anyway, but in the famous words of someone...
But we've done this do-si-do before, so I'll say nothing more beyond that
OK, let's get serious.
My argument is that we are rewarding those who are just too bloody lazy to think about other players. Yes this, in a way, punishes those who have a genuine reason for missing their turn, but isn't this why players are still able to pick up their just desserts when their turn next comes round?
I think those who are more diligent, should be rewarded, and yes perhaps they can use it to their advantage, I have done so on numerous occasions.
In short, those who miss turns are rewarded by having the facility to add, post attack, so there is already, in my humble opinion, enough for them.
EDIT: I do, however, think the idea by _big_easy_ has legs, if refined.