I'll throw a hat into the ring.
1) A watch, once bought, becomes the property of the owner to do with as they please. Therefore, I have no problem with someone modding a watch.
2) If there is any concern regarding the selling of the watch in the future, then the mod needs to be fully reversible without damage. If that's not possible, then the mod has to be thought about with this in mind. Modded and/or watches with the wrong components will always fetch lower prices on the secondary market, and depending on the mod, it can increase the suspicion of the potential buyer.
3) I like mine the way it is, but I've thought on and off about getting a PO second-hand (the arrow) and asking my watchmaker to install it instead of the small lollypop. I think it unifies the hands VERY well. That being said, I've obviously not done it yet, and probably won't, because in truth I can't be bothered because I don't care enough to do so. The general design line of the original makes me happy as it is. The large numerals on the bezel, for example, complement the large lumed surface area of the aviator hands and indices, so I'm happy with those. Everything else, including the Speedmaster-style bracelet, is fine (even the clasp, which fits me well without the need for micro-on-the-fly-adjust). So really, it's a perfect iteration in my view.
If you want my advice, I'd say 'follow your heart'. If you like a different bezel, and it'll make the watch look more 'correct' in your eyes, then what have you got to lose by modding it? Watches are bought and enjoyed due to emotion, so make yourself as happy as you can. What I think about your mod is irrelevant because I'm not the one wearing and enjoying it.