I'm not sure how Intel are going to be able to justify wasting billions of more dollars if they cannot sort out the shortage in their current marketplace. They are going to be bleeding market share if not careful, and the amount of wasted time and resources that have gone in to 10nm development will only get bigger, unless they either come to market with huge amount of SKU's across all their segments in the next 18 months on 10nm then they are going to suffer. Whether that be running a 10nm that is more like a 12nm, or just dumping 10nm, keeping 14nm+++++++ going, and sorting the 7nm out by 2021-2023.
Either way, the shift from 14nm to 10nm needs to happen very, very fast, or not at all in order for Intel to be seen as taking its own market seriously by the people who actually own Intel stock.