Whilst I never had a problem with my Red FD, I switched to a Rival FD (identical to Force) and the shifting is quicker under load.
I have had the same issues and have since put on the new Red Yaw FD and it is infinitely better.
Without the need to go to the yaw FD simply get a Shimano DA FD or a SRAM Force. I went with Force from RED as well as replacing the RED rings with Praxis rings and shifting is superb.
I first changed to Praxis chainrings which made a decent difference in front shifting, then after a few niggles I changed to a Force front derailleur.
Shifting is now on a par with my Dura Ace 7800 equipped bike, which in my opinion sets a benchmark for smooth shifting, only Di2 shifts bettr than 7800 in my experience, 7900 was a step backwards in shift quality, which prompted me to try SRAM.
I've been thinking about Praxis quite a bit but I really like my current 52/36 gearing and as far as I can tell that's not an option
(correct me if I'm wrong though)
learn to set it up right.
There's always one..
Go ride your bike - feel better