You wont get the same transition that you get with a glow. My DLE runs pretty much the same as you describe, half throttle and its pretty much full bore and it is tuned correctly. To overcome I used a combination of linkage and throttle curve to get the stick movement to mirror how I want the throttle to happen.

You could swap the carb for a true Walbro, like what I have on my DA-100, which has a much finer throttle curve, but is still WOT at 3/4 throttle.