Not many new abilities doesn't sound very fun. Shadowrun Returns had a fuckton of progression especially with all the different classes, and you ended up really having different setups and stuff, but with the more realistic approach of this it sounds like the main differences are gonna be what weapon you use and how well you use them(spray and pray automatic weapons, sniper for long range shots and such). Sounds ok but meh don't know.
Was thinking that after I posted it, but was too lazy to edit. Regarding Shadowrun Returns that is.
The difference there is
Shaodowrun = Lots of stats you can put points into, where progression unlocks abilities and spells, not just direct power in %.
Wasteland 2 = Lots of stats you can put points into, but progression (at least that I can remember seeing) was purely in a % based form. You start off with abilities to use all the stats, but when you increase them, you increase stuff that is in the background. Less chance for jams, ability to use higher level items, ability to unlock higher level items, more proficient in use of higher end weapons. I have no idea if this changes much later, as I said, I haven't played it much, but I never got new ways to kill people, just got better at it. Not sure if it still works, but editing the savegame config file in a normal text editor also lets you increase the stats any way you want. I remember doing it, and the difference between an edited OP level 1 vs a normal level 1 was the removal of any need to using tactical stuff, and just blast away.
Weapon diversity that I saw was more in the line of old school fallout. Burst weapons have a larger chance to hit friendlies, shotguns fire in a cone, and grenades and such also have AE/friendly effects.
I will still get it though, because the atmosphere and storytelling was very Fallout 1/2ish as well, and I loved those games.