FiveAces, their teching is mostly made by starting 3-4 cities, high seas would not stop AI (or even make it turtle and build troops once it has no place to settle) but hamper your logistics.
The-Hawk, I'd recommend not to play BtS - AI is better, spies and antitank are a pain. If you have Warlords - go for it.
Recommendation for all - trade maps, find who has oil and cut it off ASAP - no tanks.
Thanks Lexad, logistics were why I didn't try high seas in first place, will continue passing on that now. And no more arid - lots of flatlands, but there's too much oil on the map and without OCC I don't need to increase likelihood of it in the capital.