PSA: Many updates in the patch apply to all save games.
 

The requirement to start a new game for changes only applies to ones with the asterisk, not all of them.
Odis Or and Undershore Brotherhood quests corrected*
∙ Quest-related (“Missing cabin boy”) army now doesn’t run away anymore*
∙ Hilda now adds a correct amount of leadership at any level*
∙ Regina now grants an attack bonus to level 5 creatures*
∙ "Greedy" achievement counter now displays the amount of gold earned correctly*
∙ Calculation of travel time between islands corrected*
∙ Amount of honey in "Block of Honey" now won’t be reduced over time if the item is not equipped*
∙ "Shamanic Doll" item functioning corrected*
∙ "Telescopic Sight" item functioning corrected*

Just these ones. Everything else will wokr fine. So if none of the above are problems, keep your current game.

my hero~~