Finally got 201 point sweep working.
You can now configure arbitrary number of sweep points between 2 and 201 (on-screen). The max sweep points over USB is still 1024.
Memory and flash usage:
Memory region Used Size Region Size %age Used
ram: 40112 B 48 KB 81.61%
rom: 112152 B 240 KB 45.63%
(The MCU on the V2 is GD32F303CCT6 with 48KB ram and 256KB flash. 16KB of flash is currently allocated for the bootloader.)