The main new feature is that long-distance travel requires much less babysitting. When the wind turns foul for your course the ship stays on the nearest tack and continues in accelerated time, and you can press a key to change tack instantly.

Sailing model changes

• Fore-and-aft sails more easily damaged
• The automatic sail plans take in sail more quickly as the wind strengthens
• The rudder is slightly more effective
• Griping reduced when making sternway
• "Helm amidships" order

Other features

• Splashes from waves against the ship - the sea looks wetter
• Landscape resolution is doubled
• Slightly more varied landscape colours, including snow
• More diegetic map
• Display of days from the last port visited; ship's bell
• The enemy attacks automatically in the battle scenario
• Random start date in world scenario

Known issues

• The sea is glitchy, and sometimes disappears altogether in heavy weather
• A "trial version" watermark has appeared at the bottom right -- this is a Unity thing, not the game.