Rakan is too dependant on Xayah to be effective on his own

Rakan's unique bonus for being with Xayah, the increased range on his E is a big buff to Rakan that benefits him but not Xayah. Xayah's unique bonus, however, is a straight buff for Rakan without any real effects on Xayah herself (although it does scale with her damage). This leads to Xayah being very strong on her own but not really that unchanged when Rakan is near, while Rakan is really shitty on his own but very good when paired with Xayah. This leads to their interactions together being more of a "Rakan needs a Xayah to be viable," rather than a, "these two champs are fine on their own, but stronger when paired together. It ends up to the point where Xayah players feel like Rakan is not the best choice for support, and that other supports are better for her, while Rakan players literally cannot play him support without a Xayah. Here are some suggested changes to help fix their interactions together, get Rakan a little stronger, and give Xayah a little nerf since she's likely too strong right now and with these changes to Rakan she'd likely be even stronger when paired with him.

Rakan:

Passive: Rakan now only lowers the shield duration by half with every auto, but so does Xayah. Xayah and Rakan both recieve the shield bonus is Rakan is near Xayah. (Notes: This interaction gives Xayah more reasons to be with Rakan. Being with him grants her more shielding to help her stay alive in teamfights, and play the lane more aggresively or more passively. They now both contribute to the shield being lowered, and as such the amount they contribute is halved.) E: Removed the interaction with Xayah. Range normalized to be 600 or 700 units regardless of the target, although it could be changed around if needed for balance (Notes: Having a different dash range whether or not you are with Xayah causes a problem for Rakan. He has to relearn his dash range depending on who he's playing with, and possibly has to change his playstyle to fit his new range. With Xayah, Rakan can look to make more aggressive plays because of the safety net from his E, while without Xayah, Rakan has to play much more passive and his lane suffers because of it. This change is a compromise between the two as it allows Rakan to be effective by himself regardless of whether or not he's with any ADC or with Xayah, and so Rakan players don't have to change their whole playstyle depending on who they're paired with.)

Xayah:

W: Bonus attack speed nerfed at early levels, still the same at max rank. (Notes: Since Xayah now wants to auto-attack more to get more shielding, giving her more attack speed so that she can get a ton of shields early would probably be too strong. Not to mention this nerf his Xayah's solo lane as well, as she can stat-check enemies with this spell less often. She still retains her late-game power with this spell, however, since the attack-speed buff is not that great when compared to other ADC's like Tristana.)