Renesmee should not have been immortal

All throughout the series, Bella's self-proclaimed motivation to become a vampire (despite other character's telling her it wasn't worth it) was that she loves Edward more than anything else and wants to stay with him forever. We see that she is stubbornly insistent upon her transformation and fails to listen to Rosalie's, Edward's and Jacob's warnings that she would want more than him later on. When she gets pregnant in BD, she finally loves or is infatuated with someone more than Edward and as she is bitten/injected with the venom starting her transformation as she is delivering Renesmee, I think it would have been a lot more interesting and poetic if either Renesmee died during childbirth, or if she had grown at an accelerated rate and died after 15 years of life. If Renesmee died in childbirth she would have immediately resented becoming a vampire and thus immortality or if she only lived for 15 years, Bella would have outlived her own child and grasped the weight of immortality and what the others were warning her about. We know Edward would never have let her die or go to the Volturi so she would be forced to stay alive and she obviously couldn't have any more biological children either. With the canon ending, it just seems that Bella got to have everything she ever wanted and experienced no meaningful growth as a character.

Also, I think it's kinda sad that Jacob has to stay immortal alongside the Cullens while watching the rest of his pack eventually age and die, just to stay with Renesmee.