In all fairness if you don't know what has been happening at this site the past year to 18 months then you have no place in sarcastically implying that the "Upgrade" is the problem that has happened.
For your information Callisto has been plagued with issues since before it became a ctwug site and said "Upgrade" has the aim of fixing most if not all of these issues.
Said "Upgrade" will also greatly increase throughput which will trickle down to you once the niggles are fixed
Said "Upgrade" is being preformed by a core team of wuggers that also happen to be the only bunch of guys that are keeping most of the Core Sites up and running. These guys all have job that take up their time and when bigger sites such as Europa/Rhea and IO go down all within the space of a week they will always take priority.
Instead of coming in here talking about said "Upgrade" why not just ask in a nice manner as to what is currently going on as you are a concerned site who's backbone link connects Callisto.
If this backbone link is so important to you i would really expect you to follow whats going on at the site you get your throughput from. We keep this page updated and the #ctwug-bellville IRC always has guys online that you can ask.
but as you say "i have not really been following this"