AS someone that used to be a drummer and gigged extensively with a Roland V kit, i can say most of the problems are down to user input / output.
Having said that, E drum kits were not that brilliant when they first emerged. But improvemenst are always made in any tech every year, so today they're pretty fabulous, as long as the drummer bothers to go into the brain and tweak. They certainly dont sound good if they're swamped in reverb. The only drum that possibly needs reverb is the snare, and even then, a short gated reverb is all thats required. Subtlety is everything. EQ ing BD , Toms, and Snare takes time but the balance that can be achieved over acoustic kits is way superior, and no mics required, which saves a LOAD of hassle
I loved my Roland , but i would love todays kits even more if i was still playing drums. I wouldn't hesitate to use another. But bass has been my wepaon for over 20 years now.