All kidding aside, I would like to see Pope Francis simplify the non-liturgical (or extra-liturgical) garb of bishops, archbishops and cardinals.  Pope Paul VI implemented some simplifications (about 1969, I think); for instance, the galero was suppressed.  Unfortunately, although use of the cappa magna was restricted (even discouraged), it was not suppressed and it has come roaring back, for a few prelates anyway.  Francis has simplified papal vesture by choosing not to use some of the more elaborate garments available to him, but I don't think he has codified it.  I know this isn't, and shouldn't be, high on the pope's agenda, but I think it would be a genuine service to the church to scale back the triumphalism and pageantry in favor of the 'noble simplicity' to which Vatican II called us.  A good first step would be to suppress the cappa magna.