In case you hardfork it, you hardfork it ONCE and when you have to, not twice a year when you feel like it and it appears to be 'maybe useful in the future'.
I believe the intent with raising it 20 fold is not to have to mess with it again for several years. We are on the shallow part of the adoption S curve at present, and when we hit the inflection point when true mass adoption occurs, tx volume may double several times within a year. That is not the time to be saying "Oh wait a minute everyone, just got to do a hard fork". And to go for minimal increase and have to do it more than once in that period would be suicide.