I'm basing on it the whole season, not on the last 5 games. I can see the argument the only concern going into the off-season is how OKC matches up against Miami, and Westbrook is better suited at his position than Harden. But if you ask me which player contributes more over the course of a season? You just can't take away Harden, who is the glue for both for the 1st and 2nd units. Westbrook is just not a consistently good PG. That offense works because Harden makes the big plays when they need them most (just not in the Finals because he's guarding the best player of this generation).
I'm not out on a limb here. OKC considered trading Westbrook back in January. Harden is only being discussed because of 5 games against Miami. Before that, you couldn't pry him from them without giving away the store in return.
I know the media talked about Westbrook being moved but I'm not aware of tangible evidence there was trade discussions. The ones I've heard of before were connected to did he and Durant get along, not was it the best basketball decision.
I'm not nearly as big a believer in basketball stats as in other sports but outside of FG%(and 3) Westbrook statistically is better than Harden, has a better PER, better raw numbers (PPG, APG, RPG etc) and again defensively it's a no contest.
The ball moves better with Harden I do agree, Westbrook over dribbles, but again he's the less polished player, hes' still getting better year over year, at a faster rate than Harden is, and he's only a year older, with much better athletic ability.
If there really is chemistry issues with Durant and Westbrook by all means trade Westbrook, but I think this series showed again Westbrook isn't the problem with OKC winning a title. He's not the one who came up short all series Harden did, he's not the one who came up short in late games Durant did. He shot too much absolutely, but he was also the one guy who wasn't afraid to take on the moment.
I actually think standing pat they'll win a title fairly soon, the problem is it sounds like Harden is going to expect a max contract and that's why theyr'e going to probably have to deal someone eventually.