I have never understood the hype surrounding Morne Morkel. Yes, he is tall, gets bounce and has pace but he isn't consistent enough and bowls too short.
I remember the hype surrounding him when SA were about to tour Australia in 08/09 and he didn't do well. He again failed against Australia and this time at home as Phil Hughes made merry against some wayward bowling from Morkel. Everyone knows that Phil Hughes mainly looks for room but Morkel continued to feed him to his strengths by bowling short and wide.
In the series against England he succeeded at Johannesburg but his bowling is suited to wickets that have pace and bounce. So it wasn't a huge surprise that he destroyed England on a pacy wicket.
As far as the series against India is concerned I found it amazing that many people thought he would succeed in India. He bowls the traditional three quarter length instead of bowling full. In subcontinent one has to bowl a lot fuller and Morkel doesn't do it. I know that most people think that Jimmy Anderson is no good when it stops swinging but even he has done better than Morkel in India. It does show that Morel perhaps is overrated. Occasionally Morkel has looked threatening in India but he just bowls too short to succeed.
He would be very good on pitches that have pace and bounce but I don't see how can he succeed on wickets that are unresponsive to the quicker bowlers.