Yea, don't bother. The only modification seems to be worthwhile with the ETB is to add a ground wire to the housing. But other than that, you won't get anything. My Focus builds use a stock TB. FocusSport and their 400hp STC project car used a stock TB.
2003 Ford Focus ZX3 2.3l N/A = 221 HP, 162 ft-lbs, firstname.lastname@example.orgMPH - SOLD
2006 Ford Fusion 2.3l Turbo = 244HP, 247ft-lbs
2014 Ford Fiesta 1.0; Turbo