If the MM531 doesn't work out for you I reckon the Xtrfy M4 is worth a try. I don't know of any mouse that has the same shape as the DA but smaller, however if your looking for something smaller while remaining a right handed "ergo" shape, the M4 is one of the smaller right handed ergo shapes I've tried. It feels very noticeably smaller in hand than the G-Wolves Skoll whcih is a size in-between the EC1 and EC2. Clicks aren't heavy on the M4 either.
Hopefully the MM531 works out for you but if it doesn't the M4 might be worth a shot.
Primary System Specs: Lian Li PC-O11 DX - ROG Maximus XI Formula - Watercooled Intel 9900k (4.9Ghz) - Watercooled RTX 2080 Ti FE - G.Skill Trident Z RGB 3200Mhz CL16 32GB - Corsair RM1000i PSU - Samsung 970 EVO 2TB NVME SSD
Secondary System Specs: Fractal Design Define S2 - ROG Maximus X Code - Watercooled Intel 8700k (5Ghz) - Watercooled Strix GTX 1080Ti OC - G.Skill Trident Z RGB 3200Mhz CL16 16GB - Seasonic X-1050W PSU - Intel 600P NVME SSD