All of my fly rods are 3 or 4 piece rods but two.  They are 7 piece travel rods.  Newer multi piece rods are fine and good makers will make multi piece rods that have great action.  I have several Wright & McGill 3 and 4 piece casting and spinning rods I bought in Alaska.  I used them for hike in fishing.  Still using them.  Fish just as good as my one piece rods.

By the way, I have never had ANY rod break , and I have traditionally been a hard hook-setter. When I was younger and more hot-tempered, I was known to have even tossed a rod or two down on the bank after losing a nice fish ! Still no breaks. I have probably used 2 pieces more than 1s through the years. I have never thought at all there might be a sensitivity issue with the 2s until I read it on these forums.

I have had only 1 two piece rod ever break on me. It was a Berkley lightning rod and it actually broke in 2 places.

 

First was the reel seat knob which was made of cork. I crazy glued it back together.

 

second was where the 2 pieces joined together. Over time it splintered at the connection on a hookset. 

One of my favorite rods is 2 piece.