CAD tools use stroke fonts, so getting search items involves another step.
The ones I’ve seen have a ghost text potted at the same XY as the stoke, and that you can search.
This gives the illusion of a searchable drawing.
Just tested Kicad v5 rc2, and it does do this - the master PDF is searchable.
Load that PDF into Acrobat Reader and print using Microsoft’s PDF printer, and that search-ghost seems to be lost.
Load the PDF into LibreOffice and you can see the search ghost (seems white flipped to black), save as PDF does still search, but visually you have doubled-items - not ideal.
Given original print does work well, just lacking the scale, I’d suggest you raise this as an enhancement request, and refer to this thread of what does work, and what almost works…
An alternative to Scaling, would be an option to ‘pdf Plot screen window’ like Acrobat has.
Scaling alone will have origin issues, but screen window allows users to control the scale/offsets visually.
Another easy-to-use plot choice is ‘Zoom to fit’, which gives the easiest to read output.
I think ‘leave title as is’ request is too hard, as title is usually part of the drawing.
Easy enough to ensure a name string is inside the window when plotting ?