No, I think they won’t 

First of all, it’s gacha and characters are specifically made so friendly and flirty towards mc, to make you buy them. They are manipulating your feelings, by baiting you with a feeling of being close with agent, but never develop this relationship, because the purpose of selling you the character is achieved and now they need to sell you next waifu as well. And on reruns they can add more flirty line to old characters in events, so you will spend more on their mindscapes or signatures.

Second, Chinese censorship, game rating and Chinese playerbase. Their playerbase is pretty aggressive when it comes to romance with waifu and if it happens, that one waifu will be possible to romance and other one not, it can cause really big mess in CN community.