The short answer is yes...just not as bad..
Here is my experience:
I came from a Samsung galaxy nexus that I had about 4 different Roms loaded on. I could never find a 4.4 ROM that would do a good job on LTE/3g handoffs. My favorite ROM ended up being the Avatar 4.2 ROM.
With the gnex, I would be in a known 4g area but it would show 3g until I would cycle the airplane mode.
When I moved to the Nexus 5 three weeks ago, I was hopeful those issues would be over. Right now I'm rooted with the boot loader unlocked but running the stock ROM.
So. far I've tried 2 custom Roms but keep coming back to stock. I still notice the slow radio handoff but it is less frequent and not as often....but still there.
I hope that helps.