Well at this stage, I woudn't even suggest to edit the UVs further as an attempted fix just yet. The first step IMHO is to review the *model* and the way it's been constructed. Based on that one last screenshot there are a few red flags in terms of both design and execution : seemingly very tiny details, thin panels, and…
Alright so knowing that this is the reference (and setting aside the term "game-ready") which in this case is only making things confusing, I'll mention the following in addition to the above comment on perceived density : This Viking character works because all the various elements have been very carefully designed ; and…