i've discussed the CR2 concept with both Christina at fenix and David C.
while interested, there was concern that there would be enough CR2 buyers.
here's how i answered that question when it was brought up-
"reguarding a Fenix P1 version in CR2 and the number of interested CR2 users -
there are lot of us! some of the most expensive and desireable lights are available only in CR2 and many of these lights sell for hundreds of dollars. many other lights made for such batteries as the CR123 but have the option of using a smaller CR2 battery holder. some of the more well known and expensive CR2 flashlights are the: Ion, JiL, all the KI versions, PEU Neoca, Orb Raw, Jetts22, Arc LS, Firefly, AmLite Neo T3 and the hopefully soon to be released production Larry Light. then there are all the inexpesive CR2 lights which include the Luxogen LR10, AdvanceMart 050-CR2 , Vortex KC1, F&L J1, NexTorch, among others.
all in all, the great thing about all CR2 lights are how tiny and lightweight they can be and how they fit so beautifully on a keychain."
i guess they need to hear there's an actual demand from buyers before anyone commits.