dBFT Weaknesses: Are there any? Or is NEO the ONE (as far as algos go...)

[ChefBoyardeez]

Having reviewed the different algorithms on this forum I came across two I like so far.  One has been discussed at length (Proof of Work) and so unless you are very well informed and opinionated there is probably no need to discuss that here.  But I welcome you to if you want. 

I would rather focus on dBFT which seems to be the Tri-Force power of algorithms if you will.  Does anyone have any glaring problems with this Algorithm?

I can't seem to find much in this forum about it aside from casual comments about how it is better than others or how NEO is the next big thing.  Beyond opinionated pieces what are the weaknesses of this Algo??