I would certainly find the game less fiddly if container sizes were increased. There are all sorts of problems I have to solve because the container size doesn't map well to the size of cpu-efficient tranport creeps, and it means I have quite strict timing requirements to collect energy from containers. These are difficult and interesting albeit fiddly problems to solve. If we got made containers much bigger, it would remove these difficulties and make harvesting gathering an easier task.
It would open up some new solutions to energy retrieval such as boosted transporters or even trains, but it would generally simplify the problem of retrieving harvested minerals.
Would the game be better if this happened? I'm not sure.
I'm don't see how this in any significant way changes risk / reward. The biggest change is to how you size and programme your miners.