When could we expect to have de FW 5.0 for our D2 Charlie, Battery drain is a big problem for me with 4.20 !
Now that an updated firmware has been released for the base platform (Fenix 5X) we typically see an updated firmware on the equivalent D2 series within 1-2 weeks. However, I don't know if the F5X release includes the elevation fix which the biggest issue outstanding and that may affect the D2 team's decision to release or not.
As for the battery issue, I presume you are using a third party watch face? The battery drain has been identified as related to using a third party watch from the Connect IQ store. This is why I am currently running the default built-in watch face on the D2C rather than my preferred watch face: UTC Titanium.