I agree that some decisions that we would consider "style" decisions do impact maintainability, and good maintainability depends on clarity and "comprehendability" of code. So in that sense, some critique of style is appropriate with regards to maintainability. So I would really consider these "maintainability" issues, and not "style" issues per se. Anything which is purely a "style" issue should be passed over.
Other areas which affect maintainability would be documentation, generalization/modularity, and abstraction.