Small blocks and slow transactions are not the same thing. Doubling block size, but not waiting until they are full before generating them, is wasteful, and doesn't really help. What is needed is faster transaction processing, and with a 10 minute average block generation time, it can never be fast. Eventually block generation will have to be below one minute in my opinion. Why don't we try to move towards it now. Waiting a few years means that blocksize will have to be reduced, and that will introduce more complications.