The issue of to TTT, or not to TTT...
Very difficult.
There is tradition there, and road cycling is a team (as well as individual) sport. Maybe if TTT should not exist, then maybe no teams should exist either?
I actually like the team aspect of the sport though, so I wouldn't agree with this happening (a teammate helping another on a bad day, the tactics of sending a domestique up the road in the breakaway, etc, the team aspect creates of lot of positive for road cycling).
Whilst a TTT is at times unfair (see Cadel Evans TDF '09), it is possible that it can add to the intrigue of the GC. It's kind of like a lesser rider gaining a chunk of time in a breakaway, or a crash costing a favourite some time - it's another variable that can change the face of the GC situation, making it less predictable.
So for me, perhaps we have a TTT in the TDF once every two or three years; and if you are going to have one, then make it significant, rather than just a bit of confectionary. They used to have 60, 70 km TTT's, and whilst unfair on some riders, I think that the return of such a stage would be exciting for fans, as the GC could get turned upside down. I still think that the GT's each year should offer varying parcours, and that the riders should select their racing season based around this (see Andy Schleck Giro 2012), so in a year when one GT has a long TTT, a rider should focus on another GT if he has a weak TTT team.