I think it is incredibly unfair on Abbott personally.
The problem is Corbyn and his LOTO team were so utterly inept at handling the antisemitism issue that it became a big thing in the public perception and for most uk jews in particular that Starmer had to act, decisively and without mercy for a lot of people in order to change public opinion and restore public confidence in the Labour Party that it was a welcoming place for Jewish people. He did that. Polling on that issue before Starmer took over and since show that.
Abbott was part of that inept team and is tainted. Then she carried on that ineptness with a stupid statement. She invited consequences. They are disproportionate in my opinion, but we are still in a very tricky period. You may have noticed the dreadful matters in Palestine keeping antisemitism prominent in the news. So Labour have a very difficult path to tread still.
I've seen Rayner and Cooper recently stating that they personally want to see her back, but it is a matter of procedure that neither they nor Starmer can interfere in. I'm sure that is technically true, but I'm also sure Starmer and his LOTO could nudge the speed either way, so my conclusion is they are pushing this back because they are concerned about the timing and optics of it. Politically, they are probably right on that. Abbott is a casualty of war.