There are no capacity issues with the cable, it's merely one of a) price and b) ISP's who are simply unwilling to invest in capacity that will be used for a few hours per day and remain unused throughout the rest of the day. This is one of the reasons we have seen a rise in offpeak pricing.
Thats what they want to fix:
Mark Rushworth commented: “ a major boost in international capacity is needed to fix the 7pm bottleneck"
The 7pm bottle neck is caused by the high transit prices on the sc cable - causing the isp's not to buy enough capacity, causing the 7pm bottleneck.
The cable itself has enough capacity