I'd like to see some animated crew walking and working on the merchants and the warships - and some lifeboats to be lowered and some rafts to be dropped over board, followed by some sailors...
Let's have a better editor - AI units should trigger an event too...
Combined/aditive triggers should be possible.
A range for speed setting would be fine ( i.e. 5 to 8 knots for variable replay or 5 to 5 knots for fixed speed).
Primary and secondary targets for attacking units (i.e. sink warships first).
A perfect documentation!
1/2 degrees for the hydrophone

and exact map tools.
No percentage of damage - but an uncertein report of the CE - light, medium, severe or dramatic damage condition.
At least 3 persons per flak - gunner, reloader and helper.
Templates of all U-Boats for easy creating individual skins and emblems.
Different port and starboard skins for the ships - or at least parts of it, for numbers and names.