Healthier food options with cleaner diets and people becoming more fitness conscious with each passing generation and it's little wonder that people seem to age slower. Couple that with advancements in medicine and you'll see movie stars age even slower with the types of personal service that comes with their success, like personal trainers and chefs etc. I started graying by my early 30's and now in my 40's have lots of gray. Though so much of that comes down to genetics, even though I like to joke and say mine personally came from working in retail for 25 ish years.
It is interesting to try and reconcile how Ewan looks in this new series and to think ten years later he will look like Alec Guinness. Then again I'm also not as much concerned about that as I am with the content of the story and the continuity being broken. I'm afraid so much of this show is going to lean on technicalities to the point where it will undermine what we already know.
From a production perspective, I'm actually quite impressed with the costumes and props, setting aside the male Inquisitor characters. To me they just look silly and cartoonish. Some designs just don't translate from animation to live action. Even setting aside my dislike of the Inquisitors as a concept for this era in the timeline, I just don't think they look good.
Vader, Reva, Kenobi himself, Owen, and the extras look fantastic though! And those early shows of the props and you just know they will be replicated here with great accuracy by the members here. For me, if the show gives us some cool new "stuff" then that scratches that creative itch for me. The show itself will be an afterthought.