Don't know if this has been covered. There may be an additional TransCanada business factor to decision to suspend pursuit of the energy east proposal
Energy east depended on transforming an existing - under-utilized -- gas pipeline across the prairies. In late September, TransCananda. got a ruling that they can now charge considerably less for natural gas transmission on that pipeline.
The new low rate could change the eastern Canadian demand for western Canada natural gas producers.
https://apps.neb-one.gc.ca/REGDOCS/Item/Filing/A86215