True, the Quarians are a resource-starved people so I wasn't suggesting everyone should be running around in Quarian Mjolnir armour,
But you'd think soldiers like Kal'Reegar would have been issued some kind of special suit for combat situations that was bulkier and offered more protection from enemy fire? Not something they'd necessarily use often or even wear everyday, but more a "smash glass in case of emergency" type deal.
The reason I suggested a Quarian engineer is that it makes sense they might have a specialised suit, to deal with the various hazards that can come with performing maintenance work or should they be required to spend extended time in EVA, such as fixing hull breaches or external repairs to the various ships in the flotilla. The Liveships alone must be a nightmare and take ages to perform routine maintenance for.
Perhaps they further customised it themselves (something we know Tali and most other Quarians do) so we can handwave the atypical upgrades as parts they scrounged and patchworked together, that aren't how the suit comes as standard.
So... less like Master Chief's Mjolnir armour and more like Isaac Clarke's engineer armour in Dead Space?
In human culture there is always a conflict between the interests of the individual and the interests of the collective, ideology forms to resolve this conflict, such as the belief that through competitive individualism the whole is made stronger by the natural growth of a meritocracy, more competitive individuals having greater sway, resources and so forth, and thus using it more productively.
Interesting in extreme situations this may not apply, such as the case of American prisoners of war in World War Two, where cigarettes were used as currency, interest was paid through food rations etc and as such there was an associated greater mortality. Allied cultures that emphasized various forms of collectivism, such as the "mateship" values of the Australians, where taking a prisoners rations for the purpose of paying interest was perceived as unethical, had a significantly decreased mortality.
So it is possible for individualism to occur in the context of limited resources and be understood as contributing to the greater good, especially in areas that are perceived to involve personhood. My understanding that the Quarians are said to use their suits to represent their personhood, express forms of individuality and belief, so the idea that the suits are focal aesthetic media in their culture is not unreasonable and if this means that some individuals can customize their suits in extreme ways, the argument that some would have armoured suits, especially when facing danger does not appear unreasonable.
Also think of resource poor cultures, hunter gatherers etc, aesthetic designs using natural pigments and clay occur. Because the suits are the most visible aspect of an individual in Quarian culture I would expect their suits to be highly customizable and show aspects of individual expression. Of course my argument is based on interpreting human culture, but again, this is science fiction, with aliens showing particular themes of human experience.