I stopped dealing with GP Moto years ago for those reasons.
Separate adjustment are available on some less expensive units, but quality often suffers in other areas to add that feature. There’s always a tradeoff.
See if you can get a ride along with the Jones brothers in their silver WRX at an autoX if they bring it out. I know they’ve been running a different car, but there’s a chance they’ll bring the WRX out. It has DMS 40’s…
I’d give you a ride in my legacy turbo with the DMS 50’s but the engine is out while my pistons get coated etc. 
-Mike