Well seeing I'm not leaking blood again at the moment, let's get real about Mikasa and how her "qualities" can be too much. She always hangs around Eren, like always. He has no breathing room whatsoever. If he wanted to go out and have a night with the boys, or in this case her husband, from what we've seen she'd still follow him around even if he asked her not to because he could say "Hello" or something to another woman. We saw it happen with Annie in AoT, Eren and her were joking around and then boom, Mikasa comes in all stalker like and goes to fight Annie. She's a problem when it comes to letting her man have space by herself, strangling his freedom. Mikasa is the type of girl who has to be around you all the time, she's overly clingy so while it is nice to have her around, she'd just get in the way of time by yourself and the boys. You could be out with the boys looking around the place and then you see this from around the corner of a wall:
This wouldn't happen with Rindou. She wouldn't destroy your fun with the lads. Even if she did crash the night, her personality is the type to make the night more fun and enjoyable whereas Mikasa would be too clingy if you're out and about with the boys. Rindou gives you more freedom.