SMA posted a Good visual representation of tint shift here
Nah, as long as the LEDs kept clean and dry it’ll be ok. My edc has the same led as above which I butchered the dome off with tweezers and a blow torch over six months ago and that’s still fine after serious use and abuse, dropped onto concrete dozens of times and gets through a battery nearly everyday, the silver base has gone dull but the phosphors fine.