I agree on Fisto. I'm got him myself, but it's weird how there just weren't enough of him.
Teela is definitely popular enough to warrant a reissue, too. I understand that reissues sometimes don't sell out, but I think enough time has passed on this one. Give her a softer tunic like the Evil-Lyns and she'll be perfect.
Definitely want a Roboto release. My initial figure and replacement are both cracked now and he's getting pricey enough on the secondary market that it's not worth the gamble to pay $50 and hope he doesn't break. Plus, the paint was generally pretty sloppy on that release compared to just about every other figure so far. My issues with the shoulders took a distant back seat to the cracks and paint, but now that we've got properly tooled shoulders we could have a figure that's really great. As a bonus, we've got tooling or 2 removable hands.
I do think that some of these issues could possibly be covered with variants, if we wanted to clear out some space in this hypothetical lineup or make this lineup more appealing. The only problem I'd have with a subscription like this is I'd personally find it insulting to pay $5-$7 more for a non defective figure with no new parts.
For example, Roboto 2.0 really should be a 200X Roboto. He'd be the same figure as before, but add an additional 200X head, some slip-on silver armor and maybe change something about the hand attachments.
If a King Hsss reissue is out of the question, include an amped up snake torso with a 200X version.
I don't care if I ever get a Filmation He-Man, but I say do it because people want it. Keep it "Classicized" by using the same basic He-Man but with the simplified harness and a new head. If you add that wrist joint, people will buy extra to swap out parts with their other He-Men.