I don't see a need for Rollins to have a manager, male or female.
In the case of Edge & Lita, it ultimately became little more than Lita being the gratuitous tits and ass of the gimmick. Aside from running around in skimpy outfits and generally acting ****ty, I don't recall anything particularly memorable.
Triple H and Stephanie was something of a different story. Prior to Stephanie becoming Trips' manager and before it was ultimately revealed they were involved in a relationship, Stephanie generally came off as this young, innocent, naive, sweet girl. We were still thinking of her and looking at her as this girl in her early 20s who was being stalked and ultimately planned to be "sacrificed" to The Undertaker. When it was revealed that she could be the greedy, hateful, manipulative, condescending asshole sort of character that her old man could pull off, it changed the game for her. I mean, let's be honest, most female managers/valets were there primarily to provide some degree of sex appeal to the male viewers whether it was Precious accompanying Jimmy Garvin in WCCW and Mid-Atlantic, whether it was Baby Doll with Tully Blanchard in Mid-Atlantic, whether it was Tammy Sytch/Sunny with Chris Candido in ECW and WWE, whether it was Dawn Marie with the Impact Players in ECW, etc. it was ultimately little more than a hot chick running around in skimpy outfits to titillate male fans. Stephanie was an exception in that she was as cunning and ruthless as her old man and Chyna looked like she could kick the ass of half the guys in the locker room.
When you look at what's ultimately going on with Lana right now in that the fact that she's hot is now truly being made the centerpiece of what she brings to the table, it makes me want to see less and less of female managers. Lana's got genuine talent as an athlete due to her years of studying dance, she has acting experience, she can fluently speak Russian and Bulgarian and there's ultimately a lot more to her than being a hot blonde with long legs in a tight mini-skirt. However, as we all know, Vince feels the primary role of women is to serve as sex objects or as damsels in distress; either that or he doesn't know how to book women in meaningful ways or he's just not interested in doing so. As a result, what we're getting is this love triangle bit in which Ziggler & Lana are actin' all sweet on each other while Rusev looks like this pathetic ex boyfriend who can't get over the fact that he's been dumped. This has Vince McMahon's fingerprints all over it and seems to fit with his twisted logic in that he's trying to get Lana over as the female "face" of WWE even though it simultaneously makes Rusev, a guy that's been a dominant heel in WWE for close to 1.5 years look like a pathetic loser instead of a monster heel that tore his way through the mid-card ranks and was a significant United States Champion for 5 months.
I've also seen WWE break out the outside interference angle with Rollins so much that I've no desire for WWE to replace J&J Security and Kane with some bimbo in a short skirt.