Unlock reset option in the MP portion of the game.. in case of a messed up character build so to speak..

I for one have chose a few unlocks that I'm not particularly happy with.. and would like to "reset " them

If you reach level 50, you can do a nanosuit reboot which will delete all of your unlocks and set you to level one.

Well, then anyone could pick and taste everything they wanted and then finally unlock the weapon they were the most content with. Don't you think it is quite unfair?

It would completely throw the game balance off and it really (I'm sorry to be so blunt) is a stupid idea.

Just keep playing. In time, you will unlock everything you want.