Extra enemies actually doing something other than prolonging the struggle is a big win for me. Them moving further into the camera is a nice touch, you can even see some more details like sweat drops flying through the air occasionally.
Here is what I think I understand about the fight mechanics so far, feel free to correct me because this was basically put together on memory and limited knowledge of the japanese language.
The enemies will attack you with regular attacks like in Parade Buster, with the occasional seduction flash depending on the enemies randomly generated personality, and sometimes a lewd attack. You can block those attacks or just keep attacking the enemies to interrupt them, for that you have one of 3 weapon types to choose from, each having a different specialty. If you get hit too many times or if one of the attacks is a grapple attack, then you get put into a lewd hold. Each normal enemy has a foreplay move (blowjob, handjob), a sex move (vaginal, anal), and a humiliation type move (kissing, smothering), also it seems like every enemy can partake in trampling the poor boy. Each boss enemy also has a unique special move (probably for the more unusual fetishes).
While in a hold, you have to block further attacks from the enemies to avoid taking more damage, you also have to hit the enemies holding you to break free at the same time so you gotta balance attack and defense, each hit against them will fill up your escape gauge. As of now it is unclear to me whether the enemy attacks or the time spent in a hold will lead to orgasm. From what I got out of this recent post, you will orgasm during holds and then afterwards you will be put in what he called a "super suppression attack", which seems to be the humiliation move. In the latest post this was a foot getting stuffed into the mcs face. During this type of hold, your escape gauge actually decreases gradually, strenghtening the hold the attackers have over the mc, and you probably either take damage after spending long enough in the hold for the escape gauge to get to 0, get set free but are weakened (like after these holds in the game Kariyume), or maybe it even outright transitions back into a lewd hold, I hope he will give some more information about that in a future update. The stepping attacks, that seemingly can be done by every character, have their own escape system, only this time the escape gauge increases with each successful defense against the stepping, while you take damage for messing up the defense.
There are still some things left unclear, but this is probably somewhat close to how the game will play, which I think is an immense improvement over Parade Buster.