+1 on being able to travel back to earlier act maps - let the players travel back to finish up some quests they may not have finished or explore areas they may have missed after jumping to the next act. there were some map travel limitations in the original BG games (BG1 for ex. getting back into candlekeep itself or into BG early before progressing the storyline chapters), but unless there is a significant narrative mechanic or rationale, idk why a player shouldnt be allowed to revisit the goblin camp or druid grove using the world map or waypoint system currently implemented.

+1 on also getting more companion choices in the next act (altho hasnt larian intimated that there would be more companions added in act 1 too?), as im somewhat concerned with how larian will implement the companion locks that have been mentioned post act 1 (in particular since it seems that larian isnt going to budge on the 4 v 6 party size debate)