While I hope they don't kill Bond off in the next film, I'm not against them bringing in a new character, be it Lashana Lynch's character or someone else, as the new 007 for a few films. I think it could be a fun change of pace to continue to explore this universe with a different character and could lead to some new and interesting stories. Plus it gives Bond an opportunity to rest for a few years to make people want to see more adventures with the character again. Then a few years down the road you could bring Craig back or have someone new in the role as Bond. To me, it would be more about the execution of the idea of having someone new be a 007 then the idea itself being bad.