I was rather hoping for some input from others here but it seems nobody has a clear idea. My own gut feeling is that GOOG will be the main stock going forward.
The Class C shares could have been issued under a new ticker, leaving the Class A unchanged. But changing the Class A to GOOGL and then issuing Class C under the original ticker signals the intention to have a Nasdaq listing for the Class C but not for the Class A. I've never heard of a Nasdaq stock permanently having a five-letter ticker.
That has to have implications. With far less liquidity for the Class A it may be that the Class C will eventually have the higher price.
I wouldn't be at all surprised if the Class A are then gradually repurchased when the price drops, increasing the voting power of Page and his buddies.