Rohit sharma batting average since he got made opener from 2013: 52, 52, 50, 62, 71, 73, 42
Barring this year(which is still good because 42 is a good average in ODIs), he is in one of the greatest ever discussion for openers.
This is Shikhar Dhawan in the same period: 50, 47, 37, 57, 48, 49, 35
This is the two of them together:
http://stats.espncricinfo.com/wi/content/records/283664.html
4th highest scoring opening pair of all time at a very comparable average to the others on the list, bettered only by VERY illustrious opening pairs. These stats, combined with the fact that Dhawan's record in ICC tournaments makes them automatic selections for any team. Poor form happens - you give people chances.
It takes different skill to succeed at the international level. These guys have done that.
You think the two of them are going to 'stink' the place up. I really don't need to say anything more.