I'd write an extensive rebuttal of this with panels, but I'm supposed to be on hiatus now, so I'll be very brief.
In brief, Zoro had
some more depth to him preskip, but he hasn't been a one dimensional edge lord postskip:
- Zoro smiled at various points in Punk Hazard.
- He had funny and heartwarming moments with Tashigi and spent a while carrying her around.
- He was laughing/smiling when he saved Luffy from Mama's Heavenly Fire just recently.
- He was smiling when he gave Chopper the antidote and entrusted things to him.
- In Wano Zoro bonded with Yasuie, Tama and Hiyori and had several emotional moments with them.
This post is based on very selective attention/memory and outright falsehoods:
- Zoro only smiles when he cuts things: False
- He smiled after seeing Kinemon cut an explosion, after reuniting with Luffy on Wano, laughed after saving Luffy from Mama's Heavenly Fire, etc.
- Zoro only cuts things: False
- He advises and chastises Luffy
- He provides emotional support for Luffy
- Zoro is not the Vice Captain: False
- See above
- After retrieving the antidote from Apoo, Zoro delegated handling the treatment to Chopper and reassured him.
- Zoro doesn't express emotions and is always angry: False
- He's been cocky, happy, sad, surprised, distressed, grateful and several other emotions.
- The claim that Zoro is emotionally constipated is a flat out lie.
- He's only really been angry at specific moments (e.g. when he swore to avenge Yasuie, when he saw Okiku's arm fall through the roof).
Most of Zoro's emotions are expressed in regards to Luffy. If you were criticising Zoro, then a criticism about his role as an accessory to Luffy's would make sense, but the current criticism is based on falsehoods.
The only thing true about what you said is Zoro having been more expressive and having more depth preskip, but the extent to which that's true has been greatly overstated.
Don't bother replying, I'm not going to see it/respond.