Good topic.
I think there are a couple of things at play here.
First it's the shadow of the past. In the Armstrong days, long attacks and different tactics virtually always failed. Most riders are still programmed to think that way, and don't realize what's possible these days.
Second, the races have far too much mountains in the last couple of days, and very little before that. This creates the effect that riders are constantly thinking: let's save my strength for the next day. This Giro was a perfect example of that. Basso, Scarponi and Rodriguez did very little, the waited and waited, untill they were at the foot of the Stelvio and suddenly realized that the only way they could still beat Hesjedal was by hoping he would crack by chasing De Gendt. In other words, they gave control away, and in the end they were dependend on external events to control their fate.
Another problem of backloaded GT's is that the differences are very small for a long time. When the top-4 are within 1.5 minute with a couple of mountain stages to go, who is really going to do an all or nothing attack, when getting some small time gaps in a couple of stages is enough to win? Rodriguez almost succeeded this year with that strategy. With a long attack you can possibly gain a lot of time (that you would never get with a 2km sprint), but if you only need a little time, why would you risk it? Putting some real mountains early in the route (so the guys who peaked later have to make up time), or put a decent time trial in the first 1.5 week should solve this at least somewhat.
And third, even regardless of doping, improved training regimes and power meters have made cycling a lot more predictable. You don't really see guys have really bad days a lot anymore, and most riders are capable of having a pretty steady level during a three week tour without big rises and falls in shape. Again, this makes risky strategies less desirable.
I think there are a couple of things at play here.
First it's the shadow of the past. In the Armstrong days, long attacks and different tactics virtually always failed. Most riders are still programmed to think that way, and don't realize what's possible these days.
Second, the races have far too much mountains in the last couple of days, and very little before that. This creates the effect that riders are constantly thinking: let's save my strength for the next day. This Giro was a perfect example of that. Basso, Scarponi and Rodriguez did very little, the waited and waited, untill they were at the foot of the Stelvio and suddenly realized that the only way they could still beat Hesjedal was by hoping he would crack by chasing De Gendt. In other words, they gave control away, and in the end they were dependend on external events to control their fate.
Another problem of backloaded GT's is that the differences are very small for a long time. When the top-4 are within 1.5 minute with a couple of mountain stages to go, who is really going to do an all or nothing attack, when getting some small time gaps in a couple of stages is enough to win? Rodriguez almost succeeded this year with that strategy. With a long attack you can possibly gain a lot of time (that you would never get with a 2km sprint), but if you only need a little time, why would you risk it? Putting some real mountains early in the route (so the guys who peaked later have to make up time), or put a decent time trial in the first 1.5 week should solve this at least somewhat.
And third, even regardless of doping, improved training regimes and power meters have made cycling a lot more predictable. You don't really see guys have really bad days a lot anymore, and most riders are capable of having a pretty steady level during a three week tour without big rises and falls in shape. Again, this makes risky strategies less desirable.