Not redundant, your idea is much more limiting than mine. You do not want supercarriers, rorquals, or titans in highsec, my idea proposes that. You don’t want capitals to do PVE, my idea allows that. And finally, you want restrictions of highsec sec status, permanent suspect status, immediate empire retaliation, if standings are not good enough, effectively, your idea has too many restrictions and penalties for the game to derive a benefit.
The only change that will be had is for capitals, supercarriers, and titans to be able to activate highsec stargates. Nothing else will be changed, the limiting mechanics of no doomsdays, cynos, and docking for supercarriers and titans should still remain for balance purposes. I would think of my idea as the way to promote yours, you want to try and promote carriers by making them nearly useless in highsec, however the best gameplay is always gameplay that benefits both the player, with his capital ship, and the community, with the content that can be derived from it.