1 - What would you improve or add in the game's combat?
An aiming system - not to rigid, even with options to turn on/off - , to focus one opponent at a time;
Better camera;
More resistant opponents, even when facing more than one;
Except for some roundhouses, every move should hit only one opponent;
2 - Would you like more fights during the game, or the way it was in Shenmue 1 works better for you?
I would like to see a lot of masters of different styles asking for sparring at anytime, one grappler, one kicker, one boxer, one that can mirror exactly the player style... They could be unlockables, for more gameplay.
I would like to see combos, parry, block, opponents resisting to throws (as QTEs or smashing a button). When low in life, more QTEs.
Real battles are almost everytime very brief, reading, reaction and one single strong blow would suffice to win almost every unruled fight; but fighting in a game this way... at first glance the idea seems very boring.