There is a lesson to be had from the 90s which writers last decade for Lorna to their detriment didn't heed. PAD's quirky scripts in the start of the 90s hit the zeitgeist of the era for a lot of fans. But, when you look deeper behind the scripts people loved there was very little there to Lorna. PAD himself recognized this by the end of his short lived first run and started making her unstable as a way to shake up the script from generic hero antics and love triangle drama which was all the character had.
Writers after like JM were kind of left in a lurch because their scripts didn't catch the zeitgeist of the era and just as importantly the comic bubble burst so the amount being spent on elective satellite titles dried up. JM and Howard Makie after him tried to make what PAD did work. It didn't work so they kept increasingly the amount they would have her be pseudo edgy by being unstable and violent in a she can't control it sort of way. Then they tried making her pseudo edgy without being edgy by making Mystique her good friend and giving her a team by the end of 90s X-Factor that looked from membership more like an iteration of the Brotherhood (including Mystique and Sabretooth) then a generic super hero team.
It didn't work for Lorna and in the end I believe it was because Lorna deep down never stopped being the generic mother hen that ascribes to generic X-Men values (of whatever they happened to be at the moment). The failure of Lorna's short lived runs last decade including two runs on X-Factor were for the same reasons as JM and Makie's Lorna failed. The scripts weren't managing to hit the public zeitgeist, the market wasn't as good as it used to be, and Lorna at the end of the day was a generic x-character with romantic and on and off mental health issues.
My comments are as much to help Leah and her coming run as they are to help the character as the two are interwoven for the time being. A Lorna who actually does see the world differently then her fellow compatriots can lend itself to interaction that doesn't fall into the trap of being only generic hero antics, romantic intrigue, and stability issues. Philosophical issues as in real ones can interject the drama that keeps the title from getting old fast in very different market from 1991 or even 2005.
Lip service as you put it to a complex Lorna doesn't get anything more then add to the list of failed titles and lead to limbo for the character. Lets hope it doesn't go that way. The thing about the character is she should be fun to read, she should care about mutants and those around her, but based on her experiences she should also should have a very different worldview and set of ethics then your blog standard X-Man and also be willing to act on those views when she feels she has to. Its the last portion that writers have trouble with and keep trying the 90s formula which doesn't work.