Yeah please do! Glad you find it so easy to read, it looks like a mess to me.
Just a few things I'd like to clarify about it though:
-Despite ornithischians only appearing later (and becoming common much
later), they're probably a more basal offshoot than saurischians (theropods and sauropodomorphs). They lack the air sac breathing system of their cousins; some very advanced ornithischians seem to have developed a mammal-like diaphragm-based system instead.
-Although herrerasaurids are some of the earliest dinosaurs ever discovered (and the earliest fragmentary dinosaur remains - from the Anisian - are thought to be of herrerasaurid origin), other groups are not
descended from them. Herreras must have become highly specialised extremely quickly after the evolution of the first dinosaurs, and are so unusual that it's often been argued whether they are in fact dinosaurs.
-There are a few controversial theories around the connection between dilophosaurids and ceratosaurs. It's been proposed that the ceratos may have evolved from dilos. It's also been proposed that dilos may not be so closely related to coelophysoids (then again, others have suggested that dilos are so similar to coelos that they shouldn't be classed as a separate group!).
I quite like the idea of an evolutionary line between coelos, dilos and ceratos, as it would mean the coelophysoid lineage lasted throughout the Mesozoic. This is not
a majority opinion though.
-Coelurosaurs didn't evolve from allosaurs, I had a bit of trouble drawing that part of the graph. They both evolved from avetheropods, apparently around the same time.
-The maniraptoran lineage is a mess. We have very little evidence for what basal maniraptorans looked like, and it seems there are huge gaps in the fossil record. Therizinosaurs and oviraptorosaurs are descended from more basal creatures than paravians, yet we have no evidence of such animals existing for tens of millions of years before we start finding the earliest theris and ovis.
You'll find similar gaps throughout the tree. Some spans of time just have very few fossil beds associated with them - the early Triassic, Jurassic, Cretaceous and early Late Cretaceous are all particularly poor.
-There's a bit of blurring between dromaeosaurids and paravians/protobirds - some researchers consider Archaeopteryx a dromaeosaurid. I don't, but I do think it's close to their evolutionary root (which probably makes dromies secondarily flightless, like today's ostrich).
-With the sauropod line, brachiosaurids and titanosaurs are much closer-related than diplodocoids. However, all three evolved around the same time, and other sauropod groups disappeared quickly after. In my opinion this has something to do with a possible ice age during the late Jurassic.
-It's possible that marginocephalians (ceratopsians and pachycephalosaurs) may have evolved from heterodontosaurids. This is a highly minority view though, and based mainly on similar tooth shape. As crocodylians and spinosaurids prove, tooth similarity has a high likelihood of evolving independently.