Combat is a lot of fun, and I've missed Fidel, but the amount of time spent on managing your inventory...
Here's the problem. Inventory management. You have limited space, there is lots of stuff to be scavenged, there is a real need for all this stuff, and it's a slow, boring process to collect, distribute, buy, and sell items in the game.
It's a shame too, because the combat, though a little uneven at times, is a blast.
Speaking of uneven, the voice-acting in this game is all over the place, often unintentionally hilarious, and the best example of this is having Fox and Wolf on the same team. Fidel is fun this time around as well, but he has yet to disobey an order and shoot a team mate in the back of the head by accident.