Good points; he has in his own fashion done quite a bit, one could admire him for that. However in my opinion we would be doing just fine without a constitutional monarchy — figure heads are just that, "very important" talking heads.  
Elevating the GG to President status — unlike the USA — with very basic, mostly representational functions, would be a step forward. 
No, at the way things are moving it won't happen in my life time and I'm not holding my breath.