v3, now status quo
The "Add..." buttons
.. are not gone - they went into the line edit's context menu.
The search mode
.. can now be switched using the shortcuts from Alt+1 to Alt+4. No more Tab- Tab-Tab and no more need to click.
.. is inside Options, though several people wanted direct access. I'd say try to work with it for some time and if it's a real pain we will have to find another solution later. Okay? I should mention that one tiny bit of this is still missing: The plan is to re-initialize Selection only when the user changes selection in the document. I expect this to come in the next few days, stay tuned. [EDIT 2008-10-13]: Just arrived with revision 970640.
.. has been removed as an option. It internally enabled when replacing text in Regular Expression or Escape Sequences mode. I hope this is working for you, not against you.