Ah, OK, I see what you mean now. Basically you're proposing proportional payouts for Dogecoin. That could work, I suppose, even if it would be subject to the issues of proportional systems. Another way could be to have a separate PPS reward system for Dogecoin.
Either way, things would get substantially more complicated for us, because we would have to implement and maintain two separate accounting systems. Also consider that we have a number of security devices in place which would have to be carefully modified.
Not to mention that the current solution of paying everything in litecoins makes things much easier and nicer for all those miners who are note interested in Dogecoin.
All in all, I'd prefer to keep things as simple and manageable as possible, so I think we're going to stick to this system for the time being. (This may of course be reconsidered in the future.)