The note states there was not enough consensus (only 30%) How much consensus would be quorum for this sort of shift? Making a hardfork is really a last resort.

The note states there was not enough consensus (only 30%) How much consensus would be quorum for this sort of shift? Making a hardfork is really a last resort. If we are trying to increase transaction capacity, is blocksize really the most efficient way to go about it (without screwing up the other aspects of BTC)?