You don't say how much time you have. There are plenty of places worth visiting between Kutacane and Banda Aceh.
The tobacco huts above Kedah were burned down by the TNI during the civil war, but some have been rebuilt. They are used for storing, drying and cutting tobacco. I don't think any tourists stay in them these days, but I usually stop for a coffee and a chat if I see anyone working there. There probably has been plenty of logging in the vicinity, mostly at lower altitudes below the bungalows, but the treeline around the tobacco huts is exactly as it was in the mid-1990s. The jungle above the tobacco huts has been very well preserved and is well worth a visit, although once you get above 1,600m the wildlife is mostly birds. The valleys boom with the sound of black gibbons.
The road from Blangkejeren to Takengon was in good shape last September. It took just 5 hours to go from Ketambe to Takengon, stopping off for petrol in Blangkejeren, some sightseeing above Pantan Cuaca village and stopping in Ise Ise to eat. But unless you are in a hurry there no reason to pass through so quickly. There's some pristine moss (cloud) forest between Pantan Cuaca and Ise Ise that could be worth exploring.
