No idea -- never heard of Xinput Plus before today.
I used to use this driver to enable force feedback in old DirectInput based games on my Xbox Controller and don't remember having run into any noticeable issues with it, so feel free to elaborate on what potential issues you mean.
Looking up XInput Plus, that tool allows rebinding what Xbox Controller buttons the virtual DirectInput controller maps to, which is sorta another use case entirely -- primarily to solve issues between games expecting different controller layouts. Sure, that tool might encompass more, feature-wise, but I see no reason as to why that would prevent the inclusion of this tool. If I only care about a couple of DirectInput games which all expects the same controller button layout then I'd personally prefer this install-it-and-forget-it driver as opposed to messing with a separate tool and whatnot.