Tried the Q2 2018 driver on the 2200G + GA-AB350N-Gaming WIFI with latest everything (BIOS, chipset, Win10).
BIOS now shows >2 GB UMA Frame Buffer options - nonetheless, 2 GB is still the maximum in Win10 by the looks of it (GPU-Z reading).
Radeon settings still can't read proper memory values (memory type, clock, bw, bit rate). We are more than 3 months after launch ...