HUmar is the 2nd highest ATK character in the game. Has a good selection of usabe gear, like PRs, SS, Macho Blades (can be wrong on this one, i don't recall now) etc. I wouldn't say HUmar is that bad or requires a tweak.
Not trying to stir debate, but on my personal opinion HUmar is better than HUney on his job and people chose to play HUney more (probably because asthetics? I don't know) and they usually like it. HUney has has access to lindcray (which is an advantage compared to HUmar), lvl20 SDJZ (another advantage), but that's it. Overall worst animations, less stats overall, no PRs and gets knock-down by more things.
I think the problem with HUmar is more a pre-concept thing rather than being inherently bad. And the fact that HUcast exists and outclasses the HUmar.
Hugs