A stage which would appear to fulfil this is this one:Of course. But there isn't a guarantee that much more ITT would have made the route better. It isn't even more likely than not.
The most important aspect of a GT route is mountain stages which creates incentives for attacking further out than the last few kms. Then comes length and total amount of height meters on mountain stages, sequence of the stages and then the amount of ITT.

It came in the middle of week 3. It has all the ingredients. And yet, somehow, some way, the riders steadfastly refused to make the race.
I think that's part of why the 2012 Giro is rated so poorly, actually - unlike the 2012 Tour which was always going to be heavy on the TT, the route gave the chances. But without significant gaps on GC and with a péloton too scared of losing to try to win, they just couldn't be incentivised to take any risks at all.