To be honest, I was being a bit hyperbolic about the "few seconds" thing. It doesn't drain down that quickly, but it does drain noticeably even when not moving. The problem is, as your list suggests, a planned eva of only a few minutes can turn into an extended ordeal if you run into bugs or other problems and depending on the distance you have to travel that little bit of fuel saved by shutting off the engines could make the difference when you finally make it back into the pilot seat.
The fuel issue was there in 4.0, but if you were using the gravlev bikes sparingly then it wasn't that noticeable. I only first noticed it when I needed to travel a good distance (>30km) over rough terrain on Bloom to reach a hostile settlement that was surrounded by an extensive array of defensive gun and missile turrets. Halfway there I realized it was going to be a one way trip due to my vehicles quickly dwindling fuel reserves.
Not sure if it's worth inclusion in your list, but since I just had to deal with the "invincible" NPC bug again it might be worth a mention. The "invincible" NPCs are severely desynched NPCs that you sometimes find in bunkers and other locations which on first glance appear to be impossible to kill no matter how many rounds you put into them. They are often can be identified by how much they glitch and teleport compared to other NPCs in the area. Their hit box typically offset from their location onscreen so hits on the body appear to do nothing. The methods to take them out can include: using a grenade or other weapon with a percussive blast radius, running them over with a ground vehicle, or bum rushing them and doing a take-down maneuver on them. Most ship weapons also typically work to kill them, but that may have more to do with some having a blast radius effect combined with a broader spread allowing them to trigger the offset hitbox more readily.
Grenades and other weapons that deal blast damage doesn't always kill them but it can knock them down which can and usually does result in them becoming re-synched and thus easier to kill normally. Same thing with ground vehicles. Running them over once doesn't always kill them, but it can make it possible to kill them using normal means. Just don't run straight over them with the center of the vehicle if you are in a vehicle with an interior (i.e. Ursa) as they can glitch inside. Running them over with the tires is best. You will almost certainly get shot and take damage trying to perform a take-down on them, but it's sometimes the only way.