What makes you think that ORS is not a corruption game? There are no bad points, that's for sure, but there are lust points, which are pretty similar, if you think about it. I think that the new point system was made not to change the essence of the game, but to create a more immersive, complicated and believable experience. That old system of good and bad points was too simple and one-dimensional.
I'm quite sure that many of Eva Kiss' patrons are going to be very disappointed if this game will turn out to be a "romance game". It is like coming to your favorite restaurant and discovering, that instead some Italian cuisine it has started serving Japanese food only. Both are great for some people, but such a unexpected change is a disaster for its loyal supporters.
I thought it would be obvious but apparently I was wrong. First of all, the name i.e. the premise. "Our Red String" is not about red flimsy panties. It's about a bond between 2 people, 2 souls (Ian and Lena). It could either be a bond between 2 closest friends or a bond between lovers. It's clear to me that Ian and Lena are destined in some way (!) to be together and help each other out. The focus on emotional investment is much more defined and it was very noticeable in this first update.
In GGGB corruption was the premise, the core idea of the game. A sweet and innocent girl gets tempted in every step and it's her choice to let those temptations in and descend into darkness or resist and keep some sense of normality. Or choose the best of both worlds. Just like in LOP's "Eleanor: Loving Wife or Dirty Whore" and many other similar games with the female protagonist, you get to choose between 2 extremes or balance in the middle.
Lust points are not similar to Bad points, though I can see why the confusion may take place. In GGGB you sure are awarded Bad points for allowing Ash to be sexier and have as many sexual encounters as you can, but you also get awarded Bad points for taking drugs, being egotistical, betraying friends, hurting people and other acts that turn Ash into a shitty person. So the corruption in GGGB is not just sexual but emotional as well. Ashley can be sexy and have many sexual partners and still be a kind person, loyal friend, loving girlfriend or daughter and level headed career woman which the game considers "Good". Or she can be a human garbage drug addict criminal and fuck just 1 other person which the game would still consider "Bad".
In ORS Lust just determines how much Ian and Lena let their lust affect their choices and how they view sex in general. Since they're both single, even if they pursue other people or in Lena's case decide to do stripping to get extra money, it wouldn't be the same as corruption in GGGB because those options don't necessarily change their personality. They could re-evaluate their priorities in life but they won't do a complete 180 personality change like in the case of GGGB. I'd say the corruption in the original sense could more accurately be applied to the new system of Agenda a.k.a. individual connections with people around you. The friendlier you are to your friends, the better reputation you have. If you treat them horribly, the lower your reputation is.
TL;DR: Do I think there's going to be some form of "corruption" in ORS? In some way definitely, just for the sake of keeping the fanbase happy. But is it the main purpose of the game like it was in GGGB? Absolutely not. Otherwise, Lena would be the only protagonist. Male corruption is just not interesting. If GGGB had 70% of content dedicated to corruption routes, ORS will probably have 30-40% of content dedicated to the corruption of Lena and others. My original point was that people should wait before judging the game for providing a different experience instead of expecting the same and getting disappointed over it. After all, it's a new game - not a sequel.