CF tripod will matter if you are already lugging alot of equipment on your back... even if it's by a few hundred grams.
How many equipments will a nex 6 user carry?
height matters when there are railings everywhere
I don't think it's critical and that u will face railings taller than t-005 but shorter than other full sized tripod often
Weight will matter if you are trying to beat the baggage weight limit imposed by the airlines.
200g diff nia?