No thats you and your biased opinion. This game lacks so many things other great RPG's have.
(In my book, Baldur's Gate 1 and 2 are the best RPG's ever)
And what do you mean for 'A game this size and complexity"?
I don't have the promised AMAZING 'Radiant' AI.
I didn't get this really epic and awesome main story. it was average at best, like Mass Effect, only a bit worse. Okay alot worse really.
The game is only 5.1 Gigs big....a game that came out in 2010 that was an RTS was 12 gigs big. thats more then 2x the size of Skyrim
Only a 1 gig difference from Skyrim to Oblivion.
Sorry, but Bethesda should have waited another year before bringing this game out, no matter how great it already looked.
As an rpg Baldurs' Gate 1 and 2 were superb, but to actually break down and isolate the combat to look at objectively. Spending minutes before every fight to prep your characters properly with the multitudes of spells was a meaningless and remedial task that was only there because the game adhered to a D&D ruleset.
Same with stat sheets and various character traits all of that is well and good for pen and paper games, as without such you have no meaningful way to calculate or determine the strengths of your character. But as Console/PC gaming has progressed I think more and more studios are adopting the philosophy that such systems really just serve to get in the way of their gameplay. (i.e. RNG is not something they want in their games).
As much as I love my copies of the Icewind Dale and Baldurs' gate series I have to comment that the focus of player user input over stats and RNG has really grown on me. Low attack rolls, and saving throws were great for their time but I really enjoy all that being determined by me as a player and whether or not I attacked at the right time or blocked/moved out of the way quick enough. Which of course makes stat sheets meaningless as gameplay and combat like that doesn't require such complex systems because much of everything is determined by your own actions and movements as a player.
edit: On reflection your install size criticism seems really off putting as well. Its' actually surprising how much they were able to include into the game given how much space it required, and this really helps the game overall. Because if you recall ME2 suffered tremendously from that very issue and received substantial limits to its' plot because the game took up so much space as to be unplayable on consoles without requiring disk switching. Also 15+ gb games really start to become a negative for certain users within the PC crowd (i.e. people with laptops). I know technical limitations might sound like terrible reasoning to you, but its' important for success that games are able to reach the largest audience possible without ostracizing fans.