The Gothic games and Risen are the only RPGs I know of where you have an unlimited inventory.
Streamlining doesn't mean they dumb the game down, it just means they remove idiotic features that only pad game-time and promote back-tracking, not improve gameplay.
It can mean that but it usually doesn't. Deus Ex 2 was "streamlined" and lost pretty much everything that made the first one great as a result. The new Prince of Persia was "streamlined" and lost everything that made the SoT trilogy great. R6: Vegas was "streamlined" and turned a once tactical and realistic series into a linear, highly-scripted, arcade shooter. The cases where a game has been "streamlined" has, 9 times out of 10, meant that meaningful features were removed in order to make the game more accessible or have broader appeal.