My very first ride on my Kenevo, about 7 minutes in, BOOM! hit a step, ripped a hole in the tyre and dented the rim really badly...
This led me to my first conclusion, do not use folding tyres on an e-bike. Why? because if you don't have a spare tube with you, or you've already used it, you're carrying a very heavy bike all the way home! Folding tyres are bullshit, and when they go flat they fall off, so unless you want your bare rim scraping along the floor the whole way home you have to carry it, and believe me that sucks.
Second conclusion after fixing that and getting on with the ride (and obviously subsequent rides) is that the Butchers are just plain scary. The tread profile is awful, the side knobs are like literally on the sidewall of the bloody tyre with a mahoosive gap between them and the centre knobs, transitioning between them is sketchy as, i've heard the same complaint levelled at the old High Roller.
It's just my opinion but there is just not enough sidewall support for what is a very large tyre to be run at appropriate pressures for such a tyre to be effective at anything but pootling pace, tyre squirm anyone? I had to pump them up so much i might as well use smaller tyres, as they are shorter and less leverage is applied to the sidewalls.
As suggested by many people here, get the Schwalbe 2.6 MM's WIRE BEAD. Not only do they offer massively more protection, and stay on the bloody wheel if you flat, but are the number one performance upgrade you can make, transforms the bike, might be the best tyre i've ever ridden in fact... Totally predictable lean characteristics, tons of grip and no squirming around
Third conclusion, The rims are just weak and i'm still weighing up what options there actually are.
I've since fitted Hope Tech DH wheels, and they're great, i guess, but are much, much too heavy, so i'm thinking maybe heavy duty carbon rims mated to relatively lightweight hubs might be the answer but £$£$£$!!!