I've been wondering for a while and now i want to ask yo opinions on the topic

Why we need all 3 chars if it makes sense to add only to one for each class (dex for ops; int for engies; str for coms)?

As i made my first toon i was distributing points to all 3 of them and achieved quite good results, but then i began to meet all-dex-operatives with higher stats..

Will it be useful to invest in other chars later?

It'd be great to hear from a dev, but i'm interested in everyone's thoughts

My own point of view is that it could be done more thoughtfull - pitchin dex would raise your criticals and dodge; str - armor and health (tho i can't understand how str will increase dmg of ranged, energy-based weapons); int - mana and criticals (even more than dex)...