If you consider that the dApps will be able to get discounted account tokens and they will likely have RC, they can potentially  onboard and delegate to their new users directly in the future. And as you have rightly noticed, you aren't likely to ever need all of your RC so essentially there is the potential to have a bandwidth market where those same dApps or users perhaps can rent lines in various ways, just like Steem delegations. 

Seeing what the true costs are however is an important thing to do before concessions can be made. Up until this point, no one knew what was costing what where which meant many accounts were interacting in a type of debt structure without knowing it. Now it seems that it is possible to better allocate resources to where they are needed as we can see where the needs actually are. In time, this should be able to be continuously fine tuned and tweaked to support onboarding and the support of onboards as it will be clear what is required to do so. 

The current situation although uncomfortable is likely relatively short-lived but could bring a lot more opportunity as it empowers the Dapps to better serve their users which means, higher decentralization and distribution.