Regarding the EEZZ's 76mm rear hub OLD: This is the price one pays for a compact fold built around a very narrow rear triangle design. In other words, no free lunch here, if you don't like the 3-gear setup, I can't think of a way to change gearing in that narrow a space outside of fitting a different size chainring. Could be wrong, but I don't think spreading the EEZZ's rear triangle is an option, and even if you could, not sure which hub would fit in there.
The Brompton's 110mm rear hub OLD poses similar problems, but there have been ways around that spacing. The Sturmey-Archer X-RF8 is 120mm OLD and has been shoehorned into the Brommie's rear triangle. Other options include spreading the Brommie's rear triangle even farther to accept different hubs, say the Alfine or the Rohloff. Keep in mind any spreading of the rear triangle invalidates the warranty, but this is a risk many Brommie owners are willing to accept.