Weight is a big issue for me, too. But mostly because of my age and light weight, and the fact that I need to push my bikes backwards uphill into my garage. Right now my 552 pound BMW boxer is right at my limit for pushing. However, once I start riding it the weight seems to melt away. The heaviest bike that I have ever owned was my 1991 BMW K100RS, which came in around 620 pounds, or about what an Energica weighs. Back then, pushing it around was no problem for me, but that wouldn't be the case now.
As a motorcycle, I give the Energica high marks. I think it is better designed and has better chassis components than Zeros. But the weight is a factor for me, along with its greater maintenance needs. Since I use my Zero for general low-cost transportation within a 50-mile radius, it is the better bike for me. If I rode more for fun, at high speeds, on rides where the bike could be recharged at an L3 station - and was younger, I likely would have bought an Energica instead of my latest Zero. However, I will admit that I only live about 60 miles from the factory and my dealer is just a 20-minute ride away and has over 10 years of selling and servicing Zeros, so that is a big plus for me, too.