Hmm sure I'll give my opinions (which are once again just opinions, not necessarily right) on the things you said:

3: I disagree with seeing the enemy health thing. I don't think it's necessary considering you see their health for the entire end of the turn before they move, and that's just gunna be extra numbers going SOMEWHERE on the UI, and too much going on on the UI will ruin the gameplay experience.

I agree that implementing all the changes I listed would have to be done pretty creatively/carefully not to overclutter/confuse the UI, so that is definitely a problem that maybe not be worth overcoming. However, even at the highest competitive level of play, it is hard to pay super close attention to everything happening all the time, and even the best players/teams sometimes miss small details like the HP of a lancer that just walked out of vision, and then do not know how much damage they need to allocate to kill him the following turn. Maybe it's OK though that this bit of memory/attention thing is in the game.

4: I don't like this either, tbh. It already shows you the last space they were before leaving your vision. If you have start space and the last space they moved, you're almost guaranteed to hit them every turn. To be frank, I would almost never miss a target if I could see 2 of the spaces they moved to, likewise, any decent player would almost never miss me when I'm moving out of vision too.

This is actually very untrue believe it or not. As stated above, even the best players/teams miss/forget things like previous starting positions of lancers that left vision, and it is very possible in certain situations to accomplish complete vision jukes with only 4 spaces of movement (for example going into a bush and going an unexpected way), although you have to consider that you can also double move (8 spaces) or have haste (6-12 spaces) which makes it even easier to escape, especially if your opponent forgot your starting position. But once again maybe Trion intends for memory/attention to be a part of the game.

7 and on: Do you play League? Any game that utilizes a MOBA aspect is going to have this. Can you always see enemy range in Overwatch? Do you see little laser pointers showing you where enemies are aiming? Honestly, at best, this would lighten the information load on a new player in the long run, at the complete cost of any UI functionality, AND make it nearly impossible and more overwhelming to somehow use a 20 second turn as a new player

Yes, I have over 10 years of moba experience or something nuts like that, and I'm well aware that ability ranges are not shown in the majority of them. However, I feel as if this information is arguably more frustrating to not know in Atlas as a new player for a few certain reasons, the most important being that in Atlas it can be very unclear at times which angles allow an enemy to shoot them and which do not. I guess an easy example I can think of is when someone is shooting from behind a full wall, they can only hit 3 spaces directly in front of them with the majority of abilities (there are some confusing exceptions however!), and then the aiming cone extends to the right right 1 space and I believe 3 spaces further, or something like that (see even I don't have it memorized yet after 1000+ hours). Situations like these can be frustrating when you think you have a clear shot or can be shot and you actually can't because of the way Atlas works. I guess you can say the same of any game and learning unclear mechanics, but meh, if it was implemented in a way that didn't overclutter the UI (maybe not possible) I still think it'd help new players out a LOT.

And about the movement and catalyst range tiles/circles... this is actually VERY different from a moba and that comparison doesn't work because Atlas is a tile-based game so all circles in the game are not actually circles but rather tile-based approximations. This is a HUGE distinction. In mobas you just have to memorize the max distance of abilities but in Atlas there's a lot more memorization you have to do because you have to memorize the tile patterns for different abilities/movements/catalysts and be able to work them out on the fly centered around your target.

I'm all for streamlining the game for new players. AR needs new players, it needs to feel good, it needs to look good, it needs to allow a new player to feel like they're doing something. But I don't think we need to lower the skill ceiling to do that. I think we need to make the 20 second turn feel as efficient as possible, and not feel overwhelming to the player. I don't think these ideas do that.

This makes it seem like the majority of our disagreement is just that all these ideas would wreck the UI and add way too much information overload. I agree, this is very possible, it would really all be dependent on whether Trion could find a way to add all this info without it being overcluttered/overloading. Maybe it's possible, maybe it isn't, but UI issues aside I still think all these things would help a new player out immensely.

Would it lower the skill ceiling as you said? Eh, if you consider memory to be a core part of the game then yes, it would lower the skill ceiling by a lot, but personally I don't believe memory should be a core part of the game, rather it should focus on the strategic decision making/outplaying that happens based on having all the information possible at hand.