What about HCs affected by TR?
Let us hope 
This can be even more imo
This makes sense it you think that el dorado give +40 hp to a unit having 60
I am favorable in nerfing water civs, even more. Like even vikings a 10% flat discount and Italians a huge 30% dock discount nerf.
However, if so, to avoid a total kill of Italians on hybrid maps I would buff the age up discount like 20/25/30% for feudal/castle/imp (or a flat 25%). With a 30% doch tech discount this is still a killing nerf on water especially in imp. Take a look at the computation New italians after the update and further ideas for the next ones - #250 by Sylux1000