The problem with isometric is it's usually a bit difficult getting text and dims to look correct. You tend to have to modify individual dims/text to match the iso-pane you want them to "appear" in. E.g. using the DimEdit Oblique and draw a line in one of the ISO panes. Then you also might want the text to appear as if drawn isometrically (instead of orthogonally) by adjusting the Obliqueing property, but that requires some further mods for dims.
Whereas if you draw directly on the 3d objects then the text & dims will also be drawn correctly as well. And if it's just a few lines (instead of true solids) you can still draw them in 3d.
But it's up to you if you want 2d/3d drawings. And with something like those ISOtools you get around most of ISO's problems. You'll need some extras to get the text/dims things to work that way as well.