I have done a couple of gigs with e-drums. I own the Yamaha DTX 900, Yamaha DTX 500 and Yamaha DTX Multipad with a an electronic h-ihat, snare pad and cymbals connected to it. Almost all of my practice at home is on the electronic pads. I have also tried the new Roland kits and the digital hi-hat is nice. The Roland digital snare and ride are also nice but not a huge leap from the three zone pads on the Yamaha. (IMO with only limited use of the kits)
I much prefer acoustic drums for all the reasons stated above. In addition, I have an entrapped nerve in my right forearm and the rubber cymbal pads and hi-hat when used for an entire gig cause a lot of pain that takes days or weeks to subside.
However, there is a lot you can do with an electronic set. Yes, it is different from an acoustic set but it offers a new palette of sounds and can be a lot of fun to play. Give it a try, you just might find that it meets the bands requirements and allows you to express yourself in new and fun ways.
That said, here are my suggestions to help minimize the issues with gigging with e-drums:
1. If you are using in ear monitors it is best to have a separate monitor mix that allows you to have the drums at the volume you want, otherwise you may end up hitting too hard just to hear yourself properly.
2. Always have spare cables. I have had a cable go at the beginning of a gig and it is much easier to identify the problem (pad vs cable) if you have have extra cables.
3. Always have an extra power supply. They are usually not very expensive and if it goes the drums won't work without it.
4. If you are gigging a lot and for good money, an extra electronic brain should be considered, which would also cover the need for an extra power supply. I have used my DT900 for 12 years and never had a problem, but it is always in the studio. If the brain doesn't work then there are no options for drums. Not like an acoustic set where you can change heads, MacGyver a hardware fix or just use the pieces that are not broken. Second brains can be expensive and also need to be configured the same as the original brain so a lot depends on whether missing a gig with drums would be catastrophic or just an inconvenience. Of note, I also play Cajon in a trio/duo and would be fine using a mic on a Cajon with my classic rock band in a pinch (as a backup).
5. The other issue not mentioned is that there is no low rumble, like you get from the bass drum. (Same problem with in ear monitors). While it does not bother me, some people find it distracting not having that immediate feed back from the bass drum and add something like a butt kicker to add that vibration. I am not suggesting adding a butt kicker, just pointing out what I have heard from some other drummers online.
Jim