The syncing workflow could use a major facelift.
Merging Clips is a destructive form of syncing that just doesn't work that well. They also cause many problems in the conform and if sync is off they need to be completely redone, causing headaches and manual replacement throughout the project. Sometimes they bug out when you bring merged clips in fro another project and certain tracks get out of sync.
There is also the create multicamera source sequence which doesn't tell you this is the preferred method to sync clips. The negatives are that it is a cumbersome dialogue box with a lot of options that don't really get you what you want without a lot of tweaking.
There is also "grouping" clips and "linking" clips. This is a messy naming format because they can mean all the same thing. Perhaps a clear naming convention will help smooth this process
The best option would be to consolidate Merge Clips, Multi Camera Source Sequence and Synchronize into a single panel that we can call the sync panel. In that panel we can create a Sync Nest of each clip that we can call a Synced Clip.
The Synced clips can be nested with each track within the main timeline without having to go in the nest. They would essentially twirl down. So track 1 would contain Production tracks 1-7 and be labeled 1.1, 1.2, 1.3 etc. Each channel can be routed via the sync panel.
There can be a syncing workspace as well.
Streamline the right click clip window. It has gotten way too long it almost takes up the entire screen. Consolidating the 5 different Sync buttons into one separate section in the dropdown would help clean that up.