There, I typed it. Now I realize the point of this excercise is to haul the spirit of UFO into the new millenium, but if there's one particular piece of the old game that could use redoing it's that. As is, it's rewarding the player for engaging in illogical, monotonous tasks. Examples would having the team members run circles out of sight of the enemy in order to gain AP, or adding additional never-to-be-used grenades to their backpacks in between every other mission to build strength. It's not to the point of gifting handguns to the Aliens and having them train reflexes for you, but only because knocking Aliens unconscious hasn't been implemented yet.
This is not good game design, nor does it make sense from a flavor point of view. Worse, it's tedious. It replaces time spent not actually playing the game in any meaningful sense of the word with in-game stat increases. It takes time and focus away from what should be the core of gameplay - tactical combat - and replaces it with what, +2 strength?
Please reimagine. Even something simple like random skill advancement would be a gigantic leap upwards from this. Hell, scrap skill advancement outside of Morale/Nerve altogether and it would be a step up. Kinda like they did with the olde Rainbow Six games -you had a rooster of guys/gals with different skillsets, some obviously superior to others and thus had an incentive to keep the better dudes alive (and having to make do with inferior replacements should they become wounded/KIA).
EDIT: Basically, talking about this and why it detracts from the game.