I don't see any reason why they couldn't do both. LBD was a comedy/romance, now it's Gigi's turn?
I haven't read farther than Chapter 2 of Sanditon yet -- I'll be interested to see what JA was able to foreshadow in what she did manage to write before her death. :-( However, the Sanditon Vlog writers will probably want to finish the story, so maybe there'll be a HEA for Gigi as there was in LBD for Lizzie/Darcy and Jane/Bing.
