on exactly what issues that you are talking about.

I'm fairly certain that there will be glitches and bugs, all games have them, especially ones that are this big. One would hope that this is a well tested game, as the engine and basic build has been used several times before. Still, probably an even sort of thing.

Some people complained that the FPS aspect of the game butchered the feel and intent of the original Fallout games, which were turn based. Well, there isn't going to be any real changes here from FO3. This will still be a real time action, with VATS to slow time and load up shots. I know that they've refined some of the mechanics and the interfaces, especially in dialogue and in companion interactions. If you didn't like this in 3, you probably won't in the new game.

The look. Fallout 3 was overtly beige and oppressive. Now, I know that the designers put in a lot of work to add color and texture to the world, and they added New Vegas which should be a complete change in the world. Still, I would imagine that a lot of the locations will have a similar deserted and destroyed look. This is the same engine and basic build from FO3, so I'm sure there will be similarities in the look and feel. And, with a game environment as large as this one, there will be only so much variety of looks, feels, and environments. (Adding a little more variety is area that I hope improves a bit. That and letting some of the living spaces actually be cleaned a bit and looking cared for... people will do this eventually after a couple hundred years for goodness sake)

The story, especially the side quests. This is one area that a lot of people have made comments that FO3 was lacking. Well, this is the area that is open to question. A lot of people who worked on the original games, FO 1 & 2 and the never completed Van Buren, had lead roles in the development of this game. This group has a reputation for good and complex storytelling. The stated intent of the designers and writers was to reconnect the franchise with its roots, use more of the established history, to create a 'real' Fallout experience. This should be an area that the games is improved, but the final determination will be after a person plays it for themselves. (While FO3 did lack in creative writing at points, I still love the game as a whole).

There are some changes in this game that should allow the player to craft a more unique and immersive experience.

The rather awesome and difficult sounding Hardcore mode. The PC will need to eat, drink, and sleep, or suffer the consequences, up to and including death. Ammo will have weight. Medpacks and Radaway will work over time... and things like broken limbs won't be healed by medicine. Playing the game like this will be more of a survival experience... and will force the player to learn and master some of the new skills and options available in the game.

Crafting. One of the new aspects of this game is that players will be able to make new things: food, meds, drugs, weapons, ammo. The player will be able to alter and specialize weapons, add features to them. From the early reports, there are a lot of different options for crafting.

Reputation. The designers are introducing reputation this time around, which should lead to a greater diversity in the games interactions. There are several factions and smaller groups at play in this game. How the player interacts with them, even sometimes what they are wearing, will affect how each group perceives and interacts with you... like if you happen to be wearing an enemies uniform, or if you double-crossed someone from the faction in the past. Supposedly, your reputation can even be different in different locations in the game, based on some of your actions. This should lead to a more varied and complex interaction with the game and the story.

Combat. I've heard rumors that you can specialize your fighting to certain degrees as well. I don't exactly know how that all plays out, if you can develop a style or certain moves or what. I do know that one of the combat styles is customizable and upgraded from the previous game. Melee fighting has a lot more options, which will include finishing moves tailored around which weapons you are using.

It certainly sounds like the designers were aiming for a deeper, more variable experience with this game. If all this makes a better game, or not, will be a question that people will probably start answering very soon.