Yeah in theory, it sounds great, but this could be open to abuse from bots. If you give too many RC's away to new accounts this could just lead to more SPAM. This is a fine balancing act for sure.
For now, the 'dApps' onboarding new users may need to delegate SP to ensure the new users can use their apps as intended.
Not ideal for sure, but could solve a problem or two.
In an ideal world dolphins and above should be able 'sponsor' or 'buddy up' with new users to share their RC credits. ie. You go fishing in the plankton pool and give someone or many people that you think have potential access to your RC credits. (Let's call it Delegated RC)
Just thinking out loud.
What is spam? Is my comment here spam?