@Trialdruid play whatever suits your style of play, and what makes fun gameplay for you. Now, with that said, Jva has got a point. Displacer Beast is superior in every way. There are reasons to why theory crafters in the 19 bracket, and highly respectable FC druids chooses Displacer Beast over the other talents.
Your argument for win/loss ratio could as well come down to how your "team" plays as well, rather than individual play.
You should be looking into the situations you put yourself into, and look at the value the talent gives you. Yes, if you're literally not being touched, Feline Swiftness will make you cap faster, because it adds more overall movement speed, but in situations where your team simply does not provide you with enough space, situations becomes tricky and you will need that extra kiting tool.
Take into account the factors that druids already outrun everyone by default, so there is no point in adding more overall movement speed. What you do need is an "oh duck button". Displacer Beast provides that. Displacer Beast will simply be your number one get-away option. Feline Swiftness does not provide the same kind of thing. If you're caught, then you're caught. This is not the case with Displacer Beast (granted it's off cooldown of course). Now, with Displacer Beast having a cooldown, you also have to think about when to use it. Do you use it headlessly to decrease travel time? No. Because in most situations you want to save it for tricky situations, so that you can get away, or use it as a bursty way of traveling towards your team. An example could be the ToT jump, and displacering towards your team, blinking past the cutting enemies waiting for you. There are just tons of situations where Displacer Beast becomes significantly better.
-Kiting, because druid already outruns everyone by default.
-Instant, off gcd "oh duck" get-away. Because the bracket is so burst orientated, even the slightest uptime the enemy team will have on you can mean death. So you want to create a gap as fast as possible.
-Burst traveling to avoid potential gaps where stealthies and other cutting classes / groups could/should await you. Whether you have a visual or not.
These are just a few mentions. Take our word for it when we say that there are resons to why, as previously mentioned, theory crafters within the bracket, and top FC druids take Displacer Beast over the other talents. Now, I am no FC myself, but you can ask other FC druids, and they will come to the same conclusion, and can maybe provide you with more information as to why Displacer Beast is superior.
TLDR; Displacer Beast is better, but play whatever you like. In the end of the day, it's your choice to make, and you should play whatever you find the most enjoyable.