I did finish the game but it's hard to remember what I did. You do end up getting a lot of the augments, you can't get them all but I think I had around 50. As you progress, the upgrade points (I can't even remember what they were called) become available for purchase every once in a while and you can find some. To start I believe I upgraded most of the hacking stuff but by the end of the game I was tired of hacking computers as I typically hacked every single computer I came across. I'm sure you can get by with whatever you choose. It is fun to get the strength one that allows you to pick up large objects, and sometimes those soda machines are blocking vents.
Did you play the original Deus Ex? I actually still remember two moments stand out in that game thanks to leg augments that helped with jumping and reducing damage on falls. One was a rooftop ambush I escaped by jumping off the side of the building and surviving. Another was similar, as I escaped some tough enemies by dropping a long ways off of a catwalk. This new one is great but I don't recall any really tough enemies. Some of the boss fights can be annoying though.
