I'd like to be able to use Link to sync up a song between Serato and Resolume on a song whose BPM increases over time. Currently Link is tied to the Sync button and the Sync button prevents the song's BPM from changing.

The way I picture this working is with another Sync option in addition to those available currently. Under the Sync Preferences, a tickbox labeled "Dynamic BPM" (as opposed to the default static BPM). With this turned on, the master track would play at whatever BPM it normally would without the software artificially adjusting it, allowing a song to start at, say, 70 BPM and finish at 120 BPM. The other track (or in my case, Resolume via the Link function) would adjust along with the changing BPM.