The "low power consumption" is the only thing really worth considering.
This is what G6 should have been in 1st place. With an year old processor, it didn't have any chance against the might of Galaxy S8 only except with these new updates.
Why still 821?
LG could have enhanced it even more by keeping the RAM at 6GB like the Samsung Galaxy S8 duos and fit in a Snapdragon 835 chipset!
And now LG will price it high without any huge difference between the regular and newer variant.
LG is a very nice phone to use because of its okay features but i've never thought of getting one ,HEHE .
Uninspiring chip, non-removable battery, in past LG normally only update G line, leaving G pro, lite etc even V lated update or no update.