90% of the RP I find IG doesn't mention or even attempt to care about the Lore. It isn't bad RP ether. The Lore simply does not matter when the RP is based off the worlds CURRENT actions. Not the worlds PAST actions. The lore is the PAST and is where everyone's journey begins. But CURRENT actions are what everyone's RP is based off of. So make it in chernarus or dont. Makes no difference. The RP will feed off IG actions and events not what a Lore said.
To sum it up I dont think having a super fleshed out Lore is important. I think events in the world drive RP and that is whats important. Nobody cares where the infection started and nobody is going to have better RP just because the Lore is written out more. People will have better RP by what happens IG and what world this community decides it wants. Does most this community just want bandit RP. Then regardless of how the Lore is written thats what the world will be like.
If the Lore starts in 2017 then IG it will be vital and mentioned for a little while. A year passes and it wont matter because IG actions will fuel everyones RP and the start is just a baseline for what develops.
Edit - To be completely honest the Lore is god damn worthless. Its only there to state what the threat is and why we are all stuck in one place. The threat is a virus and we are all stuck in Chernarus because the game itself doesn't allow us to leave. So we make some BS up about how we lose someone and stayed or how its not worth the risk of adventuring out and running into the same things. My favorite is the "Military will just shoot you down. Helicopters are proof." The whole World of DayzRP is based off characters actions and your backstory. The lore is just a guide and personally I think guides to anything are better when simple. If the Lore starts in 2017 ( It most likely will ) then it will be the center and guide for all RP for a little bit. Dont make it complicated make it simple and bendable. That way we can all follow the guidelines but put our own touch on it.
This is my opinion.