Yes, it's only the flights CMB-FCO that have been dropped.
I had three business class return trips booked BKK-FCO for later this year. I decided to cancel one and get a full refund (takes 8-12 weeks to process). With another I decided to go via Paris with onward flights to Rome on AZ. And with the third booking I am travelling via LHR, with an overnight in London on the way out and a hotel provided in Colombo on the way back (for a 12-hour layover). I did appreciate the opportunity to have a little bit of variety with the routings.
SriLankan have been good in accommodating my requirements, but did need a little pushing to get things moving. I initially dealt with the UL Melbourne office, but as this has now closed, most of my communication with UL is now via email, where they are quite helpful and responsive.