Re: Smoke more than normal!
Short journeys won't help any engine as it never get fully warmed up, but hard acceleration wouldn't help as much as a good run now and again. IE 20 - 30 miles to get the engine fully warm.
The MAF does not clog the system up, it just monitors the air flow/density into the engine, the egr causes oil mist and exhaust fumes to go into the inlet so this could foul things up in a long time. (But you adjusted yours to minimum;))
I would say is just natural, mine smokes the same when cold 5 - 10 min into my journey its gone. I do 52 miles a day and it never gets any worse or better ;)