Austen's Lorna by late 2003 one could imagine sitting down for tea with Emma and debating philosophy. Milligan's Lorna was too unstable for that after what Lorna saw in space unhinged her mind... again.
After his run she was rebooted to her 70s portrayal, made an aspect in Havok's story again and sent into space for a half decade. But, after about a year Havok decides they have to stop with the generic hero stuff and fight like a space X-Force and then comes alot of war and killing. Then she goes back and forth based on writer on what she believes and what she stands for.
The problem the character has had is the lack of a guiding light or goal on what she stands for and a core pathos or central motivational force for the character.
In 2002 to early 2005 it was the Genoshan genocide, then Milligan wanted it to be what Lorna saw in space, then Brubaker wanted it to be Havok and it stayed Havok until PAD's re-written memory story and killing her mother became the new key to her pathos as a character. Bunn changed the key to her pathos back to an individualist prospective of wanting to help Havok and get to know her father and nothing deeper.
You wouldn't believe how many X-Men fans took the view openly they didn't give two shits about Lorna until The Gifted.
But, to answer your question what Lorna needs is a central driving pathos for what motivates the character (not who) that one writer to the next respects and a very clear involvement in mutant politics not generic superhero stuff. Her popularity and it was significant coming off the early 2000s was shattered by the space arc and X-Factor didn't rebuild it and neither did X-Men Blue.
There are lessons to be had from Lorna’s history hence my mini history and those lessons are stark.