Nintendo's current plan with mobile, NX, etc. is not exclusively Iwata's, even if he greatly influenced it. Hiroshi Yamauchi admitted while he was president that he was outvoted by the board which was the entire point of instituting that system.
In the short term, it's likely Nintendo's course is set, and it doesn't make sense to deviate from it. The further away the company gets from what Iwata was involved with, the stronger Kimishima's influence will be. I don't share the same concerns over Nintendo asking what Iwata would do. It restructured management and the internal development teams. Kimishima was chosen for stability. He's a seasoned businessman, and the logical, shot-term choice. Iwata was a very different president than Yamauchi, and Kimishima will be a very different than Iwata. Look at what he's already said in his first week. Those are things Iwata never would have said in public.
I think Nintendo knows it can't run a company based on Iwata's memory. I'd liken it to Apple. The iPhone 4S launched shortly before Steve Jobs passed, and subsequent models were very much in line with Jobs' choices. The years passed and the company matched forward. We have larger screen iPhones, a mini iPad, a ginormous iPad with a stylus. Those aren't Steve Jobs' decisions. It takes time to move away from past leadership and institute a new culture. Nintendo has been through this before albeit not as abruptly.