I think we should activate SegWit and then do something like this.  The bizarre fixation everyone seems to have with the blocksize being a whole number is silly, when there's literally nothing wrong with 1.1mb or even 1.21mb if we adjust by 10% increments.  Fixed, rigid caps are also ill conceived.  The most pragmatic approach is a conservative and algorithmic dynamic blocksize with built in safeguards to prevent gaming the system.