I love my Modded DL4. I've never had an OG stock DL4 for comparison but issues seemed to stem from the PC board mounted switches,...which the mod took care of. And also some sort of volume loss which the mod also took care of. The expression control is icing on the cake.
Here is a thread that details the mods.
http://www.ilovefuzz.com/viewtopic.p...ilit=drasp+dl4
I have the blue one towards the end of that thread and received it in trade from fun loving TBer/ILFer Behndy.
It's a very clean and quiet delay (my guitarist in Mecha Shiva has an analog voiced digital delay that is hella noisy and also an old SMM) and can do a great deal of sounds including some very out of this world mechanical sounds with a short delay time.
My favorite feature is the fact that it will save your presets so when you do on the fly noises with it; IE tape drags and overlapping delays with the tap tempo,...your starting point is saved.
Excellent piece of gear. If you want a DL4,...my suggestion is try and find a good deal on a used one and have it modded.
As far as low end loss? Well that just depends on what you do with it. If you are just using it for a typical delay then no,...the modded DL4 doesn't loose any low end. If you use it for what I use it for (which is unsafe music to begin with) then you run the risk of loosing low end but that's more of a setting/operator "error" thing than a result of the pedal not being low end friendly.