2. As long as LTC network is healthy and stable, there is no value in adding POS. I am blatantly shilling here, but if you are interested in a version of DOGE that you can stake, check out
LiteDoge https://bitcointalk.org/index.php?topic=1077390.0 It has a rocky past but it is cheap at 2 satoshis, staking is highly rewarding, and it still has a small but dedicated community.
I will give LiteDoge a try! They're extremely cheap. The only thing I don't get is how many coins are required for staking? Or is it that I could start staking with any amount? Thank you for sharing this info.