I have paddles that use the twist lock and paddles that use the push button; both work just fine.
When I paddle into a fairly brisk wind, I usually opt for the 60 degree setting. In less wind I might go for 45 degrees. A time, or two, the wind was strong enough that I was happy to have a paddle that allowed 90 degrees.
The Aqua Bound paddles I have used weren't carbon, but they were surprisingly very comfortable and effective.
On the subject of ferrules; the newer Werner push button rigs are slicker than snot.