I don't think it is a good idea to make them transferable. I actually think the ACTs were a bad idea from the beginning: they were obviously created by Steemit to get away from their promise to use the ninja stake for onboarding new people. Now it is basically just a perk for big accounts. Making them transferable would create a market that would only make it more of a perk for the big accounts.
Having accounts be purchased is the best way to prevent abuse by spammers who will otherwise create as many accounts as they can. ACTs already bypass this to some extent, but it could be much worse if they were transferable.
I think the best solution is a good system for handling lite accounts at the 2nd layer. We're planning to implement this after the upcoming release. My guess is we will have something by the end of Summer. We're also looking at collaborating with the VSC project, as they also have some ideas about implementation.
It is great to hear about the details of what is going on behind the scenes. It is an interesting approach. Will this feature go live after the next hard fork or one after the next?
It won't require a hardfork, so we can release it at any time.
That is amazing to know! Thank you!