KV-2 (r) in store, do we know for sure if will be affected by HE changes?

DomoSapien: Well the devs stated that vehicles that primarily rely on HE such as the KV-2, Japanese heavies, and that one low-tier italian medium will be looked at separately as part of the shell rebalance.

Whether or not this means it will ultimately end up getting hit with what folks may consider a nerf, I'm not sure. Personally I'd say that 'better safe than sorry' is a better policy than 'buy it and hope it gets refunded if you don't end up liking the changes'.

Maybe hold off until you've got more information? I'm sure the KV-2® will hit the premium shop again at some point in the future.  EDIT: lol apparently putting an R in parentheses turns it into the symbol for registered trademarks - to be clear we don't claim the KV-2 as a registered trademark of Wargaming