I, too, own an E2L Cree, but have no plans to replace is with a 2-level version. The 1-level is simple, reliable, and works great.
I also want a smaller light with long runtime so I am buying the current 1-level Cree E1L and expect delivery shortly. The new 2-level version is specified as having a shorter battery life than the 1-level (8.5 vs. 10 hours).
Surefire must have changed the E1L web page this week. The runtime on high had been listed at 4 hours (see the copy in the Google cache), but it is now listed as 8.5 hours. Huh?
I always carry one or two Arc AAA-P lights so I have a low level light available.
May buy a 2-level E1L in the future, but I prefer a simple on/off, longer life light for now.