As the title says, it really doesn't feel rewarding to grind strikes for hours on end to hand in all your tokens in the hopes of getting the weapon you're chasing and receiving nothing but useless armor.
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On that note, why not also add "frames" to vendors, similar to Ada. For twice the cost of a rank up package, let me buy a Nameless Midnight Frame that requires me to get 50 precision kills with scouts in strikes. Numbers might need to be tweaked or frames limited by rotation, but at least we're playing the content for that vendor with specific goals in mind. The large number of available drops from each vendor, plus random rolls, makes RNG extremely fickle.