I like the versatility of using braid with a leader. Such a setup could allow one to fish just about every technique. Although saying it is the "best of both worlds" is misleading. You get all of the benefits of braid, and the near invisibility of fluorocarbon, while also adding another knot to the system, but personally I dont have a problem with the knot since the alberto works just fine.
Its a fact that braid does not transmit on a slack line because of belly and that fluorocarbon does transmit on a slack line. A fluorocarbon leader does not solve that issue. Undoubtedly braid gives the ultimate in sensitivity while on a tight line. Just while fishing a jig, t-rig, dropshot, wacky senko, jackall flickshake, and twitching a fluke there will be slack lilne throughout the process and bass often hit during those times and having the sensitivity during those times is essential to me.
Also braid has no abrasion resistance and having a leader does not completely solve that problem. And while even using the higher diameter braids, at some point it will dig into the spool maybe from a snag or fighting a fish. Once this happens it will cause break offs, backlashes, lost fish, and if you fish braid long enough you will encounter this. Also braid is much more likely to tip wrap than fluoro. Furthermore, braid floats, so if you are using lighter baits you are going to have extreme belly going as the bait is falling leading to having to watch the floating braid in order to see a strike, because you certainly won't feel the strike. If the conditions are windy braids behavior gets even worse.
Fluorocarbon on the other hand has much more consistent casting behavior and allows for a more consistent feel all around. The line sinks, removing the issues with lighter baits and it also transmits sensitivity on slack line hits far better. The entirety of the line has refraction indexes similar to water removing visibility problems and the line will not bleed its color like braid does. Also, there is no worry about the line popping while fishing your lure through wood or rocks.
I will not refute the fact that dragging with braid will give the best sensitivity that one can get and that adding a fluorocarbon leader will allow for the line to have less visibility which is a good thing especially in clear waters. Braid also will last longer and is good for growing through thick grassy situations. Also, braid is great for frogging and I would not use fluorocarbon for that or any floating techniques for that matter. Also, if you buy cheap fluorocarbon you will be severely disappointed and think it sucks. Not all fluorocarbon is created equal and many have terrible manageability, stretch, knot strength and many other issues. Tatsu is great in every aspect and when backed with cheap mono is actually not that costly, still braid is cheaper.
Pick your poison!