Like, I'm not even into Deus Ex in the slightest but are the fans really up in arms about something entirely optional?
The "optional items" are only valid for one save file. In a game as reliant as choice as Deus Ex is, being able to make a brand new save to start from fresh is really important, so it means that if you want those items again (to make your playthrough a bit easier, especially on the harder difficulties), you'll need to pay again.
Frankly, that's ridiculous. APB also does the same stuff where you need to pay a HUGE amount extra of real cash in order to purchase weapons that are permanently tied to your account, rather than permanently tied to a character or limited time rented for a character.
There's also issues with Mouse Acceleration, crashes caused by setting certain visual settings to the highest (and some people getting crashes even when at the lowest), clipping issues, an in-game P2W store for a single player where you can spend real money to purchase items for single-player and so forth.
What an awful launch.