The soggy puck can be attributed to a number of factors. Headspace is one of the factors. Some other factors causing it is because of the unlimited parameters we can play with on the DE.
Slow preinfusion, bloom style, slow ramp up to pressure, slow ramp down, flow profiling etc etc during the shot will usually require a much finer grind setting, which increases the water holding capacity of the puck, which in turn causes the soggy puck syndrome. Infact a soggy puck usually indicates a a better extraction, as it means a well saturated puck.
The DE can produce tradition easy knock out pucks if you stick to the "tradition" extraction style. 30 secs, 9 bar, no preinfusion.