A fade and deficiency are the same thing... If you want a fade, just make sure it doesn't detoriate faster than the time it takes to finish... you can always add more fertilizer too... it will not hurt anything. It won't change the flavor of your buds in any perceivable way in any common sense context of a relatively healthy plant in a good environment.
Looks very minimal in this picture, so just ensure it doesn't progress too fast.. adjust fertilization for a slower fade as necessary. If it's trending that direction, no matter how slowly it goes, you know you aren't over-feeding for sure.
some less than ideal health can be related to senescence, but that is really minimal.. more like and old person with wrinkled skinned vs a young person with smooth skin, but the skin is still functional and 'mostly' the same despite it's lack of elasticity. it's not shedding like dead leaves, lol. I'm not worried about winning beauty paegents the last couple weeks, but i'm not letting any major symptoms progress either... if the existing damage is holding steady or very slow progression, that's fine, too.
A healthy plant will show minimal issues related to senescence barring a genetic anomaly - e.g some people age better than others, right? Senescence is never the cause of an absolute dumpster fire of a canopy, but some people just don't want to take responsibility for their own mistakes, lol. I've seen plenty of plants finish with little to no visible symptoms, too, and not overfed, dark and glossy, either. As with many things, it's about a happy zone inbetween, not min/max strategy.