As long as they keep the good old possibility to sell the natives 100 tobaco for 2000+ gold I am happy! And of course the ability the remove one rival the first 20 turns by sending your lone soldier into his colony
On the serious note: I really liked colo in the begining when you struggle the get resources and enough colonists (with trade-ofs like let him work a mine or be a scout/soldier). So I hope they can keep the feeling.
After the early face the next "get a lot of money to by colonist, ships and artilery" was fun to but to much micro (and boring with the ower power native trading). So improvment is needed here. Going after the AI here was fun but with tons of land around rarely beneficial. That should be improved to.
And the war of independence was a joke. I always played on the hardest level and I can't recall ever losing one, so obviously a lot of room for improvment here as well.
But I really look forward to this game! Just hope they will rum COTM, that would make it perfect!