Well, most of key stages are similar to what rumours suggested. One thing that stands out: at least 5 MTF (!) (or maybe more, not sure about Mende and Megave ) + one stage that is almost MTF (stage 9). This Tour is good for climbers and GC action is expected during six or seven mountain stages. Unfortunately these stages generally aren't favourable for long range attacks but on some stages attacks from 20+ km are possible. Also a rather long rolling ITT at the end to compensate for mountains.
Possible impact of mountain stages on the GC (5 stars in bold):
PDBF
* * *
Chatel Les Portes du Soleil * * * *
Granon * * * * *
Alpe d' Huez * * * * *
Foix * *
Peyragudes * * * *
Hautacam * * * * *
The race starts with a 13 km flat (and possibly technical) TT to shape the GC. this will be an early indication of contenders' form. I suppose there will be a lot of corners on the streets of Copenhagen, which should be slightly favourable for lighter, less powerful guys. Obviously the cobbles on stage 5 are key moment of the first week. Almost all sectors (20 km in total) packed in the last 50-60 km. Things could get interesting or maybe even dramatic if the weather is bad. Primoz can't avoid cobbles, it seems
PDBF is the first MTF in week one. As others said, it's maybe used too often. It should give us info who is who in the mountains but it's Chatel les Portes du Soleil finish that I regard as most important mountain stage in the first part of the race. I actually expect some interesting action there. Pas the Morgins is a solid climb in the first 11 km (average above 7%) and together with a small descend and another small climb to the finish it could provide GC action for 20+ km (a rest day that follows should encourage it).
Obviously the comeback of Granon after so many years is great. It's a very hard climb: relentlessly steep and really high. It's preceeded by a classical option: the biggest climb (or rather combo) in cycling: Galibier + Telegraphe. Unfortunately attacks on Galibier are unlikely (the MTF is too formidable and the next stage is hard as well). Anyway, I expect the race to explode in the final 10 km, especially if one team decides to make the tempo hard on Galibier. This could be the most important stage of the race.
Alpe d' Huez is back as well in a classical 3 climb alpine stage. It's another big day, just after Granon. No action expected before the last climb but given all those Alpine climbs cumulative fatigue may have an impact there producing significant gaps. Probably no stratospheric performances there due to the previous difficulties.
Between the Alps and the Pyrenees a stage to Mende could bring some GC action (but I'm not sure if they will finish on that steep climb?). The stage to Foix has the potential but its position before difficult stages will likely neutralize any GC action. This would be better as the last Pyrenean stage.
Peyragudes could be very interesting if some contender decides for an attack on Louron Azet. This is actually a realistic scenario (given a short descend afterwards, almost no flat sections and not too difficult final climb) and I would give the stage 5 stars but the next stage to Hautacam could cap long-range action here.
The last mountain stage to Hautacam is a very solid portion of climbing. Three difficult climbs packed in a short stage. This may be a dynamic stage and some guys will go all-out if they have to gain time. Aubisque is a legend, a good and steep climb. Too far to attack but will tire the guys out. Spandelles must be a new climb, I don't remember it but the climb looks very promising. I can even imagine a scenario, when a trailing favourite (and his team) decide to risk and explode the race there. Hautacam is the Alpe d' Huez of the Pyrenees, even if there's no action before this climb should guarantee proper GC racing.
The last rolling TT should provide significant gaps and fatigue will be an important factor. 40 km is a lot but there will be a lot of mountains in the race as well plus it's not flat and even has some climbs to help lighter guys a bit.