Yeah, I said earlier that none of this actually affects Zoro's character necessarily, but it's the treatment of the character overall.
Zoro being revealed as a Shimotsuki directly ties into his importance to the people of Wano which directly ties into Zoro forging his own legend as a swordsman/samurai. He wants his name to reach the heavens. He's a conqueror, he should have his own legitimate reputation rather than getting everything from just being Luffy's RHM. Rayleigh is both the "Dark King" on his own but also the Vice Captain of the PK. Zoro gave himself a similar title but he has yet to prove that he is deserving of it.
Zoro being revealed as a Shimotsuki directly ties into his importance to the people of Wano which directly ties into Zoro forging his own legend as a swordsman/samurai. He wants his name to reach the heavens. He's a conqueror, he should have his own legitimate reputation rather than getting everything from just being Luffy's RHM. Rayleigh is both the "Dark King" on his own but also the Vice Captain of the PK. Zoro gave himself a similar title but he has yet to prove that he is deserving of it.
How is this any different than what Zoro has been doing for the rest of the series? He's becoming a better swordsman and a stronger fighter everytime, edging closer to eventually gaining the WSS title, all while remaining loyal to Luffy and the crew.
He doesn't need to literally be Ryuma 2, that was all the fans' expectations, Wano as a whole doesn't mean that much to him personally, his backstory with Kuina does and that still remains his main motivation.
That Zoro is such a great character that he manages to come closer to his goals while still being a part of the bigger whole that is the SH crew doesn't mean that his character dooesn't shine on his own.
Like seriously y'all get too tied up in theories, feats and power level discussions that you forget what Zoro actually wants and who he is.