You answer seems inappropriate to me, and I hope to many others.
Then your using the wrong software. If your need is to create vector drawings then if you have Keynote version 5.3 use that, it is compatible with OS 10.6 Snow Leopard through to OS 10.10 Yosemite, alternatively use a dedicated vector drawing application, there are many to choose from, two are mentioned in this discussion.
It is so frustrating to see that the V6, that uses natively vectors shape, cannot export them by a simple cut and paste.
Keynote does not have this feature, use an appropriate application that meets your needs.
removing this feature is a true handicap for Keynote.
The purpose of Keynote version 6 is to; "create and deliver beautiful presentations", so states the Apple Keynote webpage.
Keynote is not disadvantaged in the least when creating presentations by the lack of exporting vector drawings.
Why would profesional designers use or promote Keynote if this software is no longer able to properly interact with other design tools?
Probably because it does in fact work very well with respected professional tools, it can import media from Photoshop, Illustrator, Word, Numbers, Excel, Indesign, Final Cut Pro, Garageband, Protools ..............
Apple has lost its common sense.
People have been saying that since 1976.