You forgot crap starting techs.
LOL ... I never even looked at those ... Mysticism and Hunting OMG!
Having to start with Hunting is one thing I seriously hate, and its one of the techs that the Khmer start with too which holds me back a bit at the start of my Sury games.
Sury of Sumeria had another advantage that I missed - starting with Agriculture and The Wheel. With the Khmer I at least have mining so I can open with either Bronze Working or AH > Writing if the start allows it.
I'm looking through the Civilopedia now, and theres actually a few Civs that I never play that also start with Hunting and Mysticism. When I played Holy Rome ages ago, it was simply to try out the 'promise' of fast rex, hugely reduced maintenance, and easy defence. Due to having nothing else to help the economy out on top of an IMP rex prior to CoL, it was actually really difficult compared to Cathy, Sury or Gilgamesh rexing.