I’ve tried playing the same piece with VSL Synchron Player directly inserted in a VST Instrument slot, and run inside VEPRO7.
When inserted in a VSTi in Dorico, the requested resources are much higher, and there are several spikes. The sound is often interrupted.
In VEPRO, everything runs smooth. Despite the only VI playing is in VEPRO, however, I see the VST Audio Engine task running a more than 100% in the Mac’s Activity Monitor.