Like XaW said, they have to rewrite the source code of the game for Unity, therefor they either had to rewrite it and push the delay further, or remove it to completely revamp it and hopefully comes back in FM26 fancy.
But to justify the data of only 5.6% playing it, is something that bugs me, like you said it has been neglected for years, and if they revamped it sooner, more people would have played it.