I'm not against using f2 as rename per se, but that should be part of a
wider thinking on how to use the function keys as a whole.
You are the third or fourth to say this, yet nobody actually had any
vision for the function keys in Haiku. Until someone comes up with a
clever way of putting them to use, and it would actually prevent using
F2 as alternative rename shortcut in Tracker, the situation has only
gotten better in the meantime. That's because if we had to remove the
shortcut again, it would be no worse than not offering it in the first
place -- i.e. something you /expect/ to work does not. Doesn't matter
much why you expect it to work (because it did before, or because you
are used to it from elsewhere).