Point 5 - Simply being able to record our own points of interests on the map. Much like it shows vendors, medics, taxis, etc. I'd like to be able to note a point where I found something I might like to return to.
I think you are referring to Point 4 though. That is referring to the basic abilities that seemingly randomly upgraded at each level, not the tree.
The ability leveling system is fairly idiotic.... You level, go find a trainer and hope you have enough money to get the abilities that are offered. You eventually get them all. There's no personal touch to it. It really doesn't make a lot of sense to have to buy the improvements unless you were given options.
For instance - My trooper tanking Trooper might prefer to improve volley fire by an extra level (than is currently offered) instead of picking up a healing ability level...