Her joining broke the family. Beast's relationship with Scott deteriorated immediately following Morrison's run (starting with the 2-part story that followed it when he confessed to no longer liking Cyclops due to his and Emma's relationship) and never recovered. Wolverine's relationship with Cyclops deteriorated after Emma influenced him negatively and never recovered. She mocked Rachel right after her mother died, and if memory serves, Rachel DID leave as a result.
More than anything the whole feel of the X-Men shifted from what it had been for decades after Emma joined and she always seemed to be in the middle of it thematically. It became more negative, less of a family, to the point where Cyclops just felt like her puppet the entirety of their relationship. It was never even remotely believable. But Cyclops became more of a villain alongside her and literally tore the team apart (Schism). There's no love in the book. No innocence. Nothing even remotely resembling the days when the X-Men loved one another, protected one another, played football with one another, and were just all around heroes.
when I spoke to both Mr. Claremont and Morrison when I was comics fan @ fan was still around , I was there as poster picking up info for mutadis mutants as reporter. the latter told us there he was told to put Emma between jean and Scott the original story was to have Emma sleep around with all the male though.
but before if you remember road trip rogue had with ice man where Emma was in his head and making sure her face was on every woman he saw like that watress he was into on the road trip in that dinner and that time she dated him in the gen X books
there as a plot where they were gonna have both of them to be December frost from x-men 2099 parents. oh and there was the what if comic of Legion's Quest where magneto was killed and it was the age of Xavier. Ice man and Emma Frost the white Queen were married and she was his trophy wife as Xavier said in that book to Scott and Jean who had Rachel and Nathan as their kids.
Bobby or Robert as Emma called him there too became more of a take charge person/ character there and managed to take over the hell fire club he also became more obsessed with money and Warren followed him to make sure he was safe etc and in that book when she was killed by the externals in it. He went nuts trying to kill them but died twith her.
any way befor that the plan was to have Emma with iceman eventually . but when new x-men came around they wanted her to be sleeping with everyone and mess with beast head a lot too. this also the time when feud was starting between fox and marvel . well the split actually. cause this was also writers were doing weairdly in mutant X prior where they said the jean of that universe slept with freaking every one .
So did that version of havok before the havok we know got put in his place/ body . Apparently, the havok we know found out that mutant X's havok had an affair with sue Richards and a few other women before being with Electra.
don't for getting how they had scarlet sleep around with hawkeye when he was Ronin and they even admitted to them have the plan to sleep with captain America which the admitted to a place like CBR. so it's not like this untrue since they admitted to those comic news outlets.
the writers admitted and this was after that thing joe stated on Newsarama that the new writers didn't like any that was younger than Reed and sue to be married and got rid of most the one's that were in the worst ways possible.
but got some trouble for it. so they put storm with black panter together shut people up and left Luke with Jessica. thank fully
for a while captain Britain and his wife Megan were in limbo .( we got mini series with him having Excalibur the sword or one of the many versions of it )and that weirdness with dazzler happened and she showed back up in London it was like she didn't give damn for finding longshot any more. she doing concerts. of all things. well just be happy they wrapped up her story of her lost kid. but she need's to spend time with him on pages.