Too old

Ew. Brosnan was minging.

-Pierce Brosnan may have been good as Bond in '85, maybe a little too early, but he wasn't given an offer until 1986, but eventually pulled out because his TV show wouldn't let him.
-Timothy Dalton could have taken it in '85 but with a darker/more serious tone like The Living Daylights and Licence to Kill

The crazy thing is that, even though Roger Moore may have been considered over the hill by Bond standards come A View to a Kill, he always still managed to cultivate a "cool grandpa" image (he still managed to maintain his dignity even after appearing in something like Boat Trip) in his later years (a la Stan Lee and Adam West). That's pretty much why, even though Roger did live a long fruitful life, I was still devastated when I first learned that he had passed away. Even more so than with Sean Connery, because Roger was not only the first Bond to pass, but he was still in the public eye at least semi-regularly than Sean.

No ill will towards Roger Moore but yeah he was a bit over the hill, and not as believeable and I do believe that he could have stopped after Octopussy, but I wouldn’t blame him, it wasn’t his decision to return for AVTAK as Cubby Broccoli was the one who wanted him back.

-Wouldn’t have minded this being Brosnan’s first outing as Bond, but I doubt that NBC would let him out of Remington Steele just yet.

-Dalton, We could have seen him doing this, but AVTAK’s tone would be be a lot darker and more serious like TLD and Licence to Kill. Sure Moneypenny would be recasted and Sir Godfrey Tibet (Patrick McNee) would be recasted to someone younger. His love scenes would be less awkward, not sure if Tanya Roberts would have been his co-star and as for Chuck Lee, I was mentioned that he was meant to be Felix Leiter originally so they could have cast John Terry or hell even get David Hedison back.

No negativity towards Roger Moore but yeah, he was too old, something he openly admitted, he could have retired after Octopussy, he could have stopped there allowing the producers to look at pontential actors for a younger Bond like Lewis Collins (Broccoli made a mistake dismissing him the first time around thinking he was too aggressive), Timothy Dalton, Sam Neill or Ian Ogilvy, IDK if Pierce Brosnan would be a potential candidate, he was still doing Remington Steele at the time. Had say Dalton had been in AVTAK as his debut, it would have been better but it would undergo several changes, it would be more serious, he would be doing the stunts, he would be well able to go toe-toe with likes of Christopher Walken and Grace Jones, in fact he and Walken would have been great movie rivals, Tibbett would have been a younger actor around Dalton’s age (say Ian McShane). AVTAK wasn’t the worst Bond, that honour goes to TMWTGG or DAD, but I felt that Rog should have stopped after Octopussy, his performance wasn’t bad but he was over the hill

I think Bond is at his best in this one. Moore was perfect in this role at his age

What's ironic is that in 1987, in conjunction with not only the upcoming release of The Living Daylights but the 25 anniversary of James Bond's cinematic debut, Roger Moore hosted a TV special for ABC called Happy Anniversary 007: 25 Years of James Bond. Roger by the looks if it, actually appears healthier in that special than he did in A View to a Kill. In A View to a Kill, Roger Moore kind of looked thin in the face.

https://www.youtube.com/watch?v=fH8MaUc7zyU

There's a recent discussion on Reddit that said that Roger Moore's physical appearance wouldn't have been much of an issue had he retained his look from The Naked Face, which came out a year prior to A View to a Kill:
https://www.reddit.com/r/JamesBond/comments/vudvc7/in_an_alternate_reality_roger_just_looked_like/

https://www.google.com/search?q=the+naked+face+1984&tbm=isch&ved=2ahUKEwj4x574i_r4AhUPhVMKHbcCCxEQ2-cCegQIABAA&oq=the+naked+face+1984&gs_lcp=CgNpbWcQA1CYBViFCWCADWgAcAB4AIABAIgBAJIBAJgBAKABAaoBC2d3cy13aXotaW1nwAEB&sclient=img&ei=5fHQYrjBDI-KzgK3hayIAQ