In this post I put a little insight comparing it with the Xbone controller.
But TL;DR:
- X360 controller has the LB and RB buttons in a awkward to reach position, your fingers fall naturally on the triggers and you need to rise way to much your fingers to reach LB or RB that is uncomfortable.
- X360 controller need external batteries, that isn't exactly the problem but the tumor that the batteries take is, you bump constantly with it while moving your grappling fingers. this also make the controller more heavy.
- Symmetric sticks are better ergonomically speaking, the lower position of the stick on the DS3 leave your thumbs in a more rested position, buttons aren't as tall as a sticks so it's OK if they are in the "far" position. your two thumbs have to reach the same height at the same position, making it more intuitive too.
- D-pad. I need to say nothing here, everybody already knows. thankfully there are X360 controllers with a transforming D-pad, I have one and is way better but still no PS or Nintendo tier.
Two of those four points seems to be fixed in the Xbone controller(battery pack position and D-pad), but I'm yet to try one by myself to feel if is any better in the remaining points.
Anyway, let's settle this here, I don't want to derail this thread any more.
on-topic:
To say truth Sega sunk an important sum of money in the years of the 16-bits with the 32x and Sega CD flooding themselves with
costly addons while doing little with them to justify a purchase from the part of the consumers. that and the rushed and convoluted development of the Saturn lead them in a spiral of destruction that ended with the Dreamcast don't reaching his expectations sales-wise and closing their hardware division and burring the poor Dreamcast alive.
I'm seeing they are repeating history with his console software division. too many and low quality(for a flagship franchise) games with forced innovations in gameplay. if you look back you'll find that their more successful titles are the ones that keep things classic or improve old mechanics.
they could take examples with Nintendo, Mario has basically the same gameplay and mechanics every game but improve it little by little instead of changing things all of a sudden, for those cases they create a sub-series like the Mario&Luigi games.