Posts like OPs show that many people PREFER the "regular" dealership model of negotiating on specific vehicles. OPs post is not the only one like it, as just recently there was another thread here talking about "who scored the best deal on a model 3?".
Lots of people want to feel like they got the same thing for "cheaper" than everyone else. Surprising, as I thought that people simply wanted to not get ripped off.
OP, as for the FSD, thats a decision that YOU need to make. Will you EVER regret not having that feature on your car... EVER? Because, its 5k now, so I guarantee you will NEVER pay MORE than 5k for it... your conscience will not allow it. It might be less later, its "supposed" to be more later but we dont know and cant predict that.
What I CAN predict however is that if for some reason you end up wanting the feature, you wont pay more than 5k for it no matter how much you want it, because that would drive you crazy... as the price of it for YOU on YOUR (soon to be) car has been established as 5k.
You have to decide if you want the features that are available now, and any new features that might be introduced in the next 2 - 3 years. Are you an early adopter of technology? Does FOMO (fear of missing out) affect you when it relates to technology things? Do you think about things like resale value?
We suspect that a car with the latest hardware will be worth more down the road (just like model S/X now). Most traditional cars depreciate based on model years and car features. I expect tesla model 3s to follow that curve as well, with the exception that, because most features on teslas are over the air (OTA) updates, having hardware that takes the features is going to be important to either you, or whoever you sell your car to down the road, and there will be some value attached to having the latest hardware (more than model year, is my guess).
I suspect that 2-3 years from now, a 2018 model year model 3 that has the FSD computer in it will be worth more than a 2019 MY tesla that doesnt, because the purchaser of that car who wants the "tesla" specific features relating to autopilot will have to budget buying the hardware and getting it put in.
You have to balance those thoughts against the very real possibility that tesla changes pricing on the features, either lowering them, or making them "included" while raising the price of the car less than the 5k you will potentially pay now.
Lots of variables, but no one can tell you what any of that is worth to YOU. Only you can decide whether any of that is worth it to you to spend now on the car or potentially spend more or less later.
Removing the 5k doesnt make it a better deal if you think you might want the features. It makes it a better deal if you think you will never want the features, simply because you are not paying for features you dont want.
Anyway, good luck with your decision. I originally toyed with the idea of getting a store demo model 3 performance when I was buying mine, but decided I wanted "new new" not "technically new but in actuality used". The value of that is also different for everyone.