I mean, there's a ton of personal preference here and lot to do with how you scout. I wouldn't call these "right answers" but my reaction to what you posted is:
1. I would never wear that vest. It looks hot, looks like it weighs at least 1lb all on its own, and is just full of empty, unused attachment points. I'd feel like a "gravy seal" humping around in that thing. I wear a high UPF sun shirt that keeps me cool and from burning without having to slather myself with paste every hour. But I scout the high Rockies. UV is murder up here. So you do you.
2. That flashlight takes me back to a hand-me-down from my grandfather. Do you actually scout in the dark? I'm a headlamp fan - mine weighs 2oz. I like it.
3. SUPER subjective but I've ditched hydration systems. Most weigh another pound between the bag, tube, bite valve, and webbing clips. I just carry two 24oz Smart Water bottles, which is pretty much the winner in the ultralight hiking community too. But again, where I go the air is thinner and breathing is a big deal. I don't want to constantly be pausing my breathing to suck on a bite valve when I'm slogging my way up a 2500' climb. I'd rather make it as far as I can, then when I get thirsty it's an excuse to stop and take an actual full drink from my bottle. I've timed it and I my pace per mile is faster that way, overall.
4. I don't know what's in all those extra gear pouches and so on, but it seems like a lot for scouting. I carry a bino harness (Marsupial currently) and my binos, a small day pack with my spotter, a few snacks, and a lunch, and my Hillsound BTR stool, plus a small med kit. It's just a scouting trip. I don't need to restart civilization up there.
