I agree with the comment made earlier in this thread that CDPR bit off more than they could chew with this game...specifically, doing a simultaneous release on both consoles and PC for a game of this scope. They would have been better off staggering the releases...PC version in May, PS4/XB1 versions in August/September/October. I think all three versions would have been more optimized at launch had they gone this route. Not bug-free (that's just about impossible), but definitely more polished and better-performing than what we got. I also think that a closed beta testing period could've been beneficial for this game.
But they made their bed by doing the simultaneous release, now they have to lie in it, bear down and get shit fixed. At least for consoles, The Witcher 3 has been the worst release for a high-profile AAA game since Assassin's Creed: Unity, and CDPR has nobody to blame but themselves. The game clearly wasn't ready for a May launch and needed several more months of testing, especially on consoles. They could've bit the bullet and announced yet another delay of 3-5 months, but I understand why they felt compelled to get it out in May...it's an expensive project, they needed to start getting a return on their investment, and they have already taken some heat from both forums and the gaming media for their existing delays.
The PS4 version being double-buffered is really bizarre. Triple-buffering should be a standard in all console games these days.
I am confident that CDPR will improve performance to a point where it's good on all versions. Their post-release support is among the best in the industry. They just need to get better at delivering an optimized product at launch, preferably without a day 1 patch.
As for Geralt's movement feeling weird and janky, I suspect that's due to CDPR's PC roots...they're accustomed to binary-type movement with KB/M. (TW3's movement is better than TW2, but still far from great.) Which is why I have little hope in that being improved. Character movement isn't exactly great in Bioware's games either...although not as bad as TW3. I think a lot of these European and American developers, including CDPR, need to play more Japanese action games...action RPGs like Dragon's Dogma, hack-n-slashes like Ninja Gaiden Black and Bayonetta, platformers such as Mario and other games like Zelda, Dark Souls and Bloodborne. Or even western games like God of War and Uncharted. And pay close attention to their basic core mechanics for movement, turning and so on. Despite the drastically varied controls and combat systems, all of those games feel good in basic gameplay stuff such as movement, turning, jumping, etc.