Botha is good in shorter formats but I think they do need someone like Imran Tahir who look to take wickets. And they don't need anymore batting down the order after top 6 or 7 and as you said Philander can bat as well so why do you need anymore batting?
No I meant if Botha can do a decent job with the ball in tests and he can provide a bit with the bat and you have Philander who can bat as well, it can really strengthen the lower order of South Africa and provide the X-factor. Imran is already 32 and hasn't looked really that threatening so far in tests in South African conditions.