[MENTION=147314]topspin[/MENTION] and [MENTION=147674]The Viper[/MENTION], as my good friend [MENTION=97523]Buffet[/MENTION] already pointed out, SA batting inability against spin is what is the biggest issue with them. Yasir has it all to run through this batting lineup in Asia, who were taken apart by SL spinners.
Another issue is SA bowling attack in Asia. Philander is ineffective and Steyn as apparent is not the same, in UAE, he will find things tougher only. That leaves us with Rabada only. Maharaj is good but bowling when pacers have done great job and you have to play support role is different from when you have to be the lead man and take lots of wickets as visible in SL. He got lots of wickets but that's because others weren't getting any.
It's Rabada or dust for SA in Asia currently.