I wanted to know now what happens with additional ship for Lanni.
Win stats previously (without Ship in port):
GJ 23,8% / St 23,4% / Ba 18,3 % / Ma 13,8% / Ty 10,5% / La 10,2%
Win stats with (5k games):
St 23% / GJ 22,8% / Ba 17,8 / Ma 15,1 / Ty 10,8 / La 10,5%
The jump too fast on conclusion is : useless change.
A little less for Stark, and main increase for Martell.*
However, important thing : games with Lanni ship but without the new tiebreaker are only ~100.
What does this mean ? That the increase of chances for Lanni with the additional ship - no one will tell you that one is bad for the Lion - is compensated by the new tiebreaker.
Indeed, in case of ties, Lanni, who in case of ties used to be resolved by barrels, usually fine for the Lion, is now resolved by CLA, which is VERy bad for him.
No surprise the biggest upgrade in the to simultaneous change was in favour of Martell : they have the biggest natural land area after Stark, and Stark goes down a bit due to the fact that the additional ship in port of LP is an incentive for GJ to go North.
To sum up my thoughts, the addition of a ship is actually good for Lanni - for example for PT generation - but the tiebreaker change has been bad.
Now, still wondering how I would do a manual rebalance if I were to make new players to come at my table (and me as game master, not as a player...). Would probably try to go for "Asha / Balon strength swap" and "deletion of Widow"s Watch" (impassable territory). First one makes GJ harder, especially to defend, and sword even more important for them, second one is one barrel and one CLA less for Stark who has too easy tiebreaks as of now.
If I were to go a step more, would like to try an "equal initial troops", that would add a ship to the three houses that start with one only: Stark with a ship in port of WF, Martell with a ship in port of Sunspear, Tyrell with a second ship in Redwyne. Won't change things dramatically, should help a bit the Tyrell especially, probably a bit harder for Bara. Have seen no major flaw or killing early moves due to that yet, helps a bit Stark and Martell to raise a CP more on turn 1 (I always hit a CoK turn 2 with these two...! ^^).
Interested in your feedbacks now !
Cheers !