One thing about slow defender is that if they read the game well and anticipate, pace is no longer much of an issue unless our defensive line is very high(which is not the way we play).
Jag was never pacy but he rarely get caught out. Same goes to Richard Gough not long ago.
Agreed, but that has been the problem with Heitinga thus far. His anticipation, tackling and positioning let him down on quite a few occasions in the past. He's still relatively young for a CD though and maybe that will come with experience.