Geez, the better eDrums play high quality samples with many velocity layers, use round robin multi-sample techniques to avoid sounding like Max Headroom, and you can layer multiple sounds etc, plus all sounds include all the FX processing that's typically lacking on acoustic kits unless you tour with your own sound and crew, plus they can do it at any required SPL (just like guitar amp modelers, sampled pianos, string libraries, synths etc).
Yes, eDrums don't allow the drummer to use all of their acoustic drum techniques, but otherwise the sampled cymbals and drums can sound fine within their triggering limitations "if" the drummer has the skills to adapt to them, live or in the studio.
This kit could easily sound great with anyone live or in the studio for rock, and with full sized shells it even looks the part...
That's it folks as I don't care if you use eDrums or not, or how you sound in SPL restricted settings, however blanket statements that eDrums can't be used live is simply BS, and way behind the times and current technology.